5598 + Interview Questions in Primary School in Chemistry Page 27 InterviewSolution

1301.	Why do all the elements of the same group have similar properties
Answer» They have similar PROPERTIES because they have the same number of valence ELECTRONS. Valence electrons are the ONES that are involved in chemical BONDING. (valence electrons just mean electrons on the OUTERMOST shell)

Discussion

1302.	What is the full form o IUPAC
Answer» IUPAC generally stands for INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY..

Discussion

1303.	What is the water formula. Salt.sodium
Answer» WATER; H2O sodium SALT: NACL

Discussion

1304.	What is combustion and what are combustible substances
Answer» The process of BURNING any substance at IGNITION temperature in combustion. Substances that BURN easily or catch fire easily are CALLED combustible substances. PAPER, clothes, wood, LPG are all combustible substances.

Discussion

1305.	What is chlorination
Answer» CHLORINATION is ONE of the methods USED to disinfect WATER

Discussion

1306.	What were the two criteria used by mendeleev in creating his periodic table
Answer» Answer: Mendeleev was a Russian chemist and inventor. He proposed two characteristics while creating his periodic table. 1- INCREASING atomic MASSES of the elements. 2- Elements with similar chemical PROPERTIES were placed in a group. He suggested that the properties of the elements are periodic functions of their atomic masses. This was KNOWN as periodic law. The arrangement of the elements in increasing order was called a periodic table.

1306.

What were the two criteria used by mendeleev in creating his periodic table

Answer»

Answer:

Mendeleev was a Russian chemist and inventor. He proposed two characteristics while creating his periodic table.

1- INCREASING atomic MASSES of the elements.

2- Elements with similar chemical PROPERTIES were placed in a group.

He suggested that the properties of the elements are periodic functions of their atomic masses. This was KNOWN as periodic law. The arrangement of the elements in increasing order was called a periodic table.

Discussion

1307.	Does bif5 exist?....
Answer» ANSWER: there is no STERIC hindrance in BIF5 due to smaller size of FLOURINE therefore BiF5 exists but BICL5 does not exist✔️✨✨✨✨✨

1307.

Does bif5 exist?....

Answer»

ANSWER:

there is no STERIC hindrance in BIF5 due to smaller size of FLOURINE therefore BiF5 exists but BICL5 does not exist✔️✨✨✨✨✨

Discussion

1308.	226Ra88 undergoes alpha-decay, its half-life is 1620 years. What is the rate ofdisintegration of 0.01 gm sample of 226 Ra88? [Ans: 3.61374 x 10^8 dps]
Answer» Answer: Radioactivity is one of the most sinister phenomena studied by chemists and PHYSICISTS. It occurs in the atomic level; in fact, in the nucleus of an atom. Essentially, radioactive decay happens when an unstable atom wants to lose energy and become stable again. It does that by emitting something out of its nucleus, which transforms into a different nucleus or into a nucleus in a different state. There are many different types of radioactive decay. One of the most common types is alpha decay: the nucleus emits an alpha particle, which is simply a helium nucleus with no electrons, and transforms into a nucleus with atomic number reduced by two units and mass number reduced by FOUR units. Generally speaking, A Z X → A - 4 Z - 2 Y + 4 2 α where Z is the atomic number and A is the mass number, given by the sum of the number of protons and of neutrons. So when you add up the A's and Z's on both sides of the equation, you get the same values. Now, we've got a radium-226 atom. That 226 means that its mass number is equal to 226; elements occur, in nature or in lab, in many different forms, with of COURSE the same atomic number but varying amounts of neutrons, resulting in varying mass numbers. These different 'versions' of an element are known as isotopes . Radium is a highly radioactive element in all forms, and radium-226 is its most stable (or, at least, longest-lived) isotope. So this radium-226 atom wants to lose energy. The way it's going to do that is by emitting an alpha particle and reducing its quantities of protons and neutrons. We know that an alpha particle has two protons and two neutrons. What happens then is: 226 88 R a → 222 86 R n + 4 2 α So, in the end, we've got an atom with 86 protons and 136 neutrons. If we look at the periodic table of the elements, we'll find out which element that is: radon! Radioactivity can be exploited in a variety of ways, both good and evil. And if you think about it, it's kind of wicked that, after THOROUGHLY disproving and mocking alchemy and its principles, we've found that it really is possible to turn an element into another. What else could we be totally wrong about?

1308.

226Ra88 undergoes alpha-decay, its half-life is 1620 years. What is the rate ofdisintegration of 0.01 gm sample of 226 Ra88? [Ans: 3.61374 x 10^8 dps]

Answer»

Answer:

Radioactivity is one of the most sinister phenomena studied by chemists and PHYSICISTS. It occurs in the atomic level; in fact, in the nucleus of an atom.

Essentially, radioactive decay happens when an unstable atom wants to lose energy and become stable again. It does that by emitting something out of its nucleus, which transforms into a different nucleus or into a nucleus in a different state.

There are many different types of radioactive decay. One of the most common types is alpha decay: the nucleus emits an alpha particle, which is simply a helium nucleus with no electrons, and transforms into a nucleus with atomic number reduced by two units and mass number reduced by FOUR units.

Generally speaking,

A

Z

X

→

A - 4

Z - 2

Y

+

4

2

α

where Z is the atomic number and A is the mass number, given by the sum of the number of protons and of neutrons. So when you add up the A's and Z's on both sides of the equation, you get the same values.

Now, we've got a radium-226 atom. That 226 means that its mass number is equal to 226; elements occur, in nature or in lab, in many different forms, with of COURSE the same atomic number but varying amounts of neutrons, resulting in varying mass numbers. These different 'versions' of an element are known as isotopes .

Radium is a highly radioactive element in all forms, and radium-226 is its most stable (or, at least, longest-lived) isotope.

So this radium-226 atom wants to lose energy. The way it's going to do that is by emitting an alpha particle and reducing its quantities of protons and neutrons. We know that an alpha particle has two protons and two neutrons.

What happens then is:

226

88

R

a

→

222

86

R

n

+

4

2

α

So, in the end, we've got an atom with 86 protons and 136 neutrons. If we look at the periodic table of the elements, we'll find out which element that is: radon!

Radioactivity can be exploited in a variety of ways, both good and evil. And if you think about it, it's kind of wicked that, after THOROUGHLY disproving and mocking alchemy and its principles, we've found that it really is possible to turn an element into another. What else could we be totally wrong about?

Discussion

1309.	English practiceА.Fill in the blanks with a verb in agreement with the subject.a car.1.One of the students2.Ten kilometresa long walk3.The cost of sugarrisen.4One of the workersbadly hurt5.Iron ore and coalfound in India6.Ten thousand rupeesa huge sum7. Either a book or your clotheson the floor ofyour room8.All of them, including their team leader,to win this competiton.9.Neither of the two solutionsacceptable10. He, along with his friends,planning a party
Answer» ANSWER: lalalalalaalhii...........

1309.

English practiceА.Fill in the blanks with a verb in agreement with the subject.a car.1.One of the students2.Ten kilometresa long walk3.The cost of sugarrisen.4One of the workersbadly hurt5.Iron ore and coalfound in India6.Ten thousand rupeesa huge sum7. Either a book or your clotheson the floor ofyour room8.All of them, including their team leader,to win this competiton.9.Neither of the two solutionsacceptable10. He, along with his friends,planning a party

Answer»

ANSWER:

lalalalalaalhii...........

Discussion

1310.	Please Donot given me the wrong answerplease solve the all answer and Do not give me wrong who give me wright answer and full answer I will follow you
Answer» EXPLANATION: BASIC oxide REACT with water to give a base acidic oxide react with base to give salt and water Amphoteric oxide react with both the ACIDS and BASES to give salt and water Pls mark me as brainliest if you are helped..... thank you

1310.

Please Donot given me the wrong answerplease solve the all answer and Do not give me wrong who give me wright answer and full answer I will follow you

Answer»

EXPLANATION:

BASIC oxide REACT with water to give a base
acidic oxide react with base to give salt and water
Amphoteric oxide react with both the ACIDS and BASES to give salt and water

Pls mark me as brainliest if you are helped..... thank you

Discussion

1311.	Vii) Which indicator willproduce a pink colour onadding a few drops of sodiumhydroxide solution? *O blue litmusO phenolphthaleinO turmericO china rose indicator
Answer» the correct option is PHENOLPHTHALEIN. plz follow and MARK me as BRAINLIEST

1311.

Vii) Which indicator willproduce a pink colour onadding a few drops of sodiumhydroxide solution? *O blue litmusO phenolphthaleinO turmericO china rose indicator

Answer»

the correct option is PHENOLPHTHALEIN.

plz follow and MARK me as BRAINLIEST

Discussion

1312.	1vi) The gas which turns limewater milky is :O sulphur dioxideO nitrogen dioxideO hydrogen chlorideO carbon dioxide
Answer» CARBON DIOXIDE is the ANSWER

1312.

1vi) The gas which turns limewater milky is :O sulphur dioxideO nitrogen dioxideO hydrogen chlorideO carbon dioxide

Answer»

CARBON DIOXIDE is the ANSWER

Discussion

1313.	Liquids evaporate on heating. Give reason.No spam otherwise I will report it .....plzz give the answer fast plzzzz plzzzz plzzzz
Answer» Answer: A given liquid will evaporate more QUICKLY when it is heated. This is because the HEATING PROCESS results in a GREATER fraction of the liquid's molecules having the necessary kinetic ENERGY to escape the surface of the liquid.

1313.

Liquids evaporate on heating. Give reason.No spam otherwise I will report it .....plzz give the answer fast plzzzz plzzzz plzzzz

Answer»

Answer:

A given liquid will evaporate more QUICKLY when it is heated. This is because the HEATING PROCESS results in a GREATER fraction of the liquid's molecules having the necessary kinetic ENERGY to escape the surface of the liquid.

Discussion

1314.	What would you like to ask?9thChemistryIs Matter Around Us PureSeparation techniquesWhile diluting a solution o...CHEMISTRYAsked on December 30, 2019 bySreejala AtkareWhile diluting a solution of salt in water, a student by mistake added acetone (boiling point 56o C). What technique can be employed to get back the acetone?ADistillationBSeparationCCondensationDEvaporationMEDIUMShareStudy laterANSWERDistillation can be employed to get back the acetone, since acetone is more volatile it will separate out first.(Distillation is a process that can be used to separate a pure liquid from a mixture of liquids. It works when the liquids have different boiling points. Distillation is commonly used to separate ethanol - the alcohol in alcoholic drinks - from water. The mixture is heated in a flask.)
Answer» ANSWER: QUESTION is INCOMPLETE.................

1314.

What would you like to ask?9thChemistryIs Matter Around Us PureSeparation techniquesWhile diluting a solution o...CHEMISTRYAsked on December 30, 2019 bySreejala AtkareWhile diluting a solution of salt in water, a student by mistake added acetone (boiling point 56o C). What technique can be employed to get back the acetone?ADistillationBSeparationCCondensationDEvaporationMEDIUMShareStudy laterANSWERDistillation can be employed to get back the acetone, since acetone is more volatile it will separate out first.(Distillation is a process that can be used to separate a pure liquid from a mixture of liquids. It works when the liquids have different boiling points. Distillation is commonly used to separate ethanol - the alcohol in alcoholic drinks - from water. The mixture is heated in a flask.)

Answer»

ANSWER:

QUESTION is INCOMPLETE.................

Discussion

1315.	26.Which of the following is correct about the given picture?(A) It is a part of the nervous system. (B) It is a part of the digestive system,(C) It is a part of the skeletal system. (D) It is a part of the excretory system.(E) None of the these
Answer» Answer: D).It is a part of excretory SYSTEM. MORE TO KNOW The diagram given is of *Kidney* It is part of excretory system. Excretion - The process of removal of HARMFUL SUBSTANCES from body is called excretion. Parts of excretory system - i).Kidney II). Urinary bladder III). Uterus IV) Urethra Kidney is a bean like structure which stores waste for some time. It has millions of *FILTRATION* *units* *called* *Nephrons* It filter WASTES from water and send for removal.

1315.

26.Which of the following is correct about the given picture?(A) It is a part of the nervous system. (B) It is a part of the digestive system,(C) It is a part of the skeletal system. (D) It is a part of the excretory system.(E) None of the these

Answer»

Answer:

D).It is a part of excretory SYSTEM.

MORE TO KNOW

The diagram given is of Kidney
It is part of excretory system.

Excretion - The process of removal of HARMFUL SUBSTANCES from body is called excretion.

Parts of excretory system -

i).Kidney

II). Urinary bladder

III). Uterus

IV) Urethra

Kidney is a bean like structure which stores waste for some time.

It has millions of FILTRATION units called Nephrons

It filter WASTES from water and send for removal.

Discussion

1316.	Correct the wrong statement:-1) the average kinetic energy of the particles is in directly proportional to the temperature of the solid.2) molecules of different types exert the force of cohesion. 3) a mixture has fixed melting and boiling points. 4) emulsion is a mixture of miscible liquids. plz someone solve this problem and I will mark the answer brainliest
Answer» ANSWER: PLEASE FOLLOW me and MAKE me as BRAINLIST.

1316.

Correct the wrong statement:-1) the average kinetic energy of the particles is in directly proportional to the temperature of the solid.2) molecules of different types exert the force of cohesion. 3) a mixture has fixed melting and boiling points. 4) emulsion is a mixture of miscible liquids. plz someone solve this problem and I will mark the answer brainliest

Answer»

ANSWER:

PLEASE FOLLOW me and MAKE me as BRAINLIST.

Discussion

1317.	5. Balance the following chemical equations :(a) FeS + HCl → FeCl, + H S(b) Na CO2 +2HCl NaCl + H,O + CO2(c)2H, + O2 +24,0(d) Na O + H2O + NaOH
Answer» EXPLANATION: HOPE it is helpful please HIT THANKS BUTTON

1317.

5. Balance the following chemical equations :(a) FeS + HCl → FeCl, + H S(b) Na CO2 +2HCl NaCl + H,O + CO2(c)2H, + O2 +24,0(d) Na O + H2O + NaOH

Answer»

EXPLANATION:

HOPE it is helpful

please HIT THANKS BUTTON

Discussion

1318.	Choose the False statement.. Single choice.(1 Point)All metallic ions are CationsAcid radicals are Anions
Answer» ANSWER: what???? EXPLANATION: What is your questions I don't UNDERSTAND

1318.

Choose the False statement.. Single choice.(1 Point)All metallic ions are CationsAcid radicals are Anions

Answer»

ANSWER:

what????

EXPLANATION:

What is your questions

I don't UNDERSTAND

Discussion

1319.	How much water is used in washingi) utensilsii) clothesiii) moppingiv) toiletsv) cookingvi) photosynthesisvii) washing homes
Answer» ANSWER: DEPENDS on the QUANTITY...

1319.

How much water is used in washingi) utensilsii) clothesiii) moppingiv) toiletsv) cookingvi) photosynthesisvii) washing homes

Answer»

ANSWER:

DEPENDS on the QUANTITY...

Discussion

1320.	Correct the wrong statement:-1) the average kinetic energy of the particles is in directly proportional to the temperature of the solid. 2) molecules of different types exert the force of cohesion. 3) a mixture has fixed melting and boiling points. 4) emulsion is a mixture of miscible liquids. plz someone solve this problem and I will mark the answer brainliest
Answer» Explanation: please MARK me brilliant and you SEND your bank account NUMBER and I will send 10 rupees in your account or in PAY app.and I will give you my ACE account name and password.

1320.

Correct the wrong statement:-1) the average kinetic energy of the particles is in directly proportional to the temperature of the solid. 2) molecules of different types exert the force of cohesion. 3) a mixture has fixed melting and boiling points. 4) emulsion is a mixture of miscible liquids. plz someone solve this problem and I will mark the answer brainliest

Answer»

Explanation:

please MARK me brilliant and you SEND your bank account NUMBER and I will send 10 rupees in your account or in PAY app.and I will give you my ACE account name and password.

Discussion

1321.	I)ii)How many atoms are present in PO ion?What is polyatomic ion? Give examples?ofCalculate the molar or mose ofc. 1.2
Answer» polyatomic ion -POLY means soft and atoms and ions TOH simple hi hai ,apne Pga hi HO ga ....aur ekk bat. . .......mujjje jaldi se brainliest bna DOH

1321.

I)ii)How many atoms are present in PO ion?What is polyatomic ion? Give examples?ofCalculate the molar or mose ofc. 1.2

Answer»

polyatomic ion -POLY means soft and atoms and ions TOH simple hi hai ,apne Pga hi HO ga

....aur ekk bat. . .......mujjje jaldi se brainliest bna DOH

Discussion

1322.	The molecular formula of the Oxide , Chloride and sulphide of Lead. choose the correct option.. Single choice.(2 Points)PbO2 , PbS , PbClPbO , PbCl2 , PbSPbO , PbCl , PbS
Answer» PBO , PBCL2 , PBS. is the ANSWER

1322.

The molecular formula of the Oxide , Chloride and sulphide of Lead. choose the correct option.. Single choice.(2 Points)PbO2 , PbS , PbClPbO , PbCl2 , PbSPbO , PbCl , PbS

Answer»

PBO , PBCL2 , PBS. is the ANSWER

Discussion

1323.	What will be the correct Electronic configuration of Argon ( atomic no. 18 ) and its valency ?. Single choice.(2 Points)( 2,8,4,2) valency =2( 2,8,8 ) valency = 8( 2,8,8 ) valency = 0
Answer» EXPLANATION: (2, 8,8) VALENCY =0 mark as BRAINLEST and FOLLOW me

1323.

What will be the correct Electronic configuration of Argon ( atomic no. 18 ) and its valency ?. Single choice.(2 Points)( 2,8,4,2) valency =2( 2,8,8 ) valency = 8( 2,8,8 ) valency = 0

Answer»

EXPLANATION:

(2, 8,8) VALENCY =0

mark as BRAINLEST and FOLLOW me

Discussion

1324.	This question is only for 11th - 12th and graduated students / TeachersWhen Thompson was so intelligent to discover an Electron then Why he didn't discover a proton because Rutherford done the same experiment and made a hole on Cathode side instead of annode side ??
Answer» ANSWER: Your answer to this QUESTION and I was THINKING about you a lot about it and I EXPLANATION: चीन रशिया 5275 65

1324.

This question is only for 11th - 12th and graduated students / TeachersWhen Thompson was so intelligent to discover an Electron then Why he didn't discover a proton because Rutherford done the same experiment and made a hole on Cathode side instead of annode side ??

Answer»

ANSWER:

Your answer to this QUESTION and I was THINKING about you a lot about it and I

EXPLANATION:

चीन रशिया 5275 65

Discussion

1325.	Jectप्लास्टिक.- पर्याचवरण पर खंतरासंकेत बिंदु-प्लास्टिक का जनमप्लास्टिक की उपयोगितापलासटिक से होने वाली हानियाँप्लास्टिक के पुर्नचकरणव प्लास्टिक सै धौने वाली हानियाँplz answer this q quickly
Answer» Answer: प्लास्टिक का हमारे पर्यावरण और सेहत पर भी बुरा असर पड़ता है। किस तरह प्लास्टिक हमारे पर्यावरण को नुकसान पहुंचाता है और प्लास्टिक के विकल्प क्या हैं आइए जानते हैं। पीने के पानी से लेकर खाने की प्लेट तक प्लास्टिक हमारी जिंदगी का अभिन्न हिस्सा बन गया है। प्लास्टिक सस्ता और आसानी से उपलब्ध होने वाला विकल्प है। इसलिए हमारी रोजमर्रा की चीजें या तो प्लास्टिक से बनी होती हैं या उनके निर्माण में प्लास्टिक की भूमिका होती है। प्लास्ट इंडिया फाउंडेशन के मुताबिक फिलहाल भारत में 1 करोड़ 20 लाख मैट्रिक टन प्लास्टिक की खपत होती है। जिसके 2020 तक 2 करोड़ मैट्रिक टन पहुंचने की संभावना है। अकेले महाराष्ट्र में रोजाना करीब 1800 टन का प्लास्टिक कचरा पैदा होता है। इस कचरे से हमारे पर्यावरण को नुकसान पहुंचता है। साथ ही प्लास्टिक हमारी सेहत के लिए भी हानिकारक है। प्लास्टिक के कणों से कैंसर होने का खतरा रहता है। साथ ही प्लास्टिक बैग में खाना रखने से हानिकारक तत्व जाने का भी खतरा होता है। ज्यादातर चीजों में प्लास्टिक की खपत होने की वजह से इसका इस्तेमाल पूरी तरह से खत्म करना मुश्किल है। ऐसे में जरूरी है कि हम प्लास्टिक के विकल्पों पर ध्यान दें। सब्जी लेते समय हम प्लास्टिक बैग के बजाए जूट या कपड़े का बैग इस्तेमाल कर सकते हैं। प्लास्टिक प्लेट या थर्मोकॉल प्लेट भी पार्टियों में इस्तेमाल किए जाते हैं। इसकी बजाए हम पेपर प्लेट या सेरेमिक प्लेट का इस्तेमाल कर सकते हैं। गर्मियों में लोगों के लिए प्लास्टिक का बोतल बंद पानी खरीदना आसान होता है। लेकिन हाल में न्यूयॉर्क स्टेट यूनिवर्सिटी की रिपोर्ट में खुलासा हुआ है कि बोतल बंद पानी में प्लास्टिक के माइक्रो कण मिल जाते हैं जो आपकी सेहत पर बुरा असर डाल सकते हैं। ऐसे में घर से ही ग्लास की बोतल में पानी ले जाना बेहतर विकल्प है। या फिर स्टील की बोतल में भी पानी पी सकते हैं। ग्राहकों को चाय, शिकंजी, लस्सी, कॉफी देने के लिए दुकानदार प्लास्टिक कप के बजाए पेपर कप या कुल्हड़ का इस्तेमाल कर सकते हैं। इसके साथ-साथ प्लास्टिक को रिसाइकिल करना प्लास्टिक वेस्ट से निपटने का सबसे अच्छा तरीका है। मुंबई, दिल्ली समेत कई राज्यों ने पॉलिथीन और प्लास्टिक से बनी चीजों पर रोक लगाई गई है। वातावरण को प्लास्टिक मुक्त करने के लिए सरकार को कदम उठा ही रही है। लेकिन जरूरी है कि हम भी अपनी आदतों को बदलें और प्लास्टिक के दूसरे वकिल्पों को अपनी जिंदगी में अपनाएं।

1325.

Jectप्लास्टिक.- पर्याचवरण पर खंतरासंकेत बिंदु-प्लास्टिक का जनमप्लास्टिक की उपयोगितापलासटिक से होने वाली हानियाँप्लास्टिक के पुर्नचकरणव प्लास्टिक सै धौने वाली हानियाँplz answer this q quickly

Answer»

Answer:

प्लास्टिक का हमारे पर्यावरण और सेहत पर भी बुरा असर पड़ता है। किस तरह प्लास्टिक हमारे पर्यावरण को नुकसान पहुंचाता है और प्लास्टिक के विकल्प क्या हैं आइए जानते हैं।

पीने के पानी से लेकर खाने की प्लेट तक प्लास्टिक हमारी जिंदगी का अभिन्न हिस्सा बन गया है। प्लास्टिक सस्ता और आसानी से उपलब्ध होने वाला विकल्प है। इसलिए हमारी रोजमर्रा की चीजें या तो प्लास्टिक से बनी होती हैं या उनके निर्माण में प्लास्टिक की भूमिका होती है। प्लास्ट इंडिया फाउंडेशन के मुताबिक फिलहाल भारत में 1 करोड़ 20 लाख मैट्रिक टन प्लास्टिक की खपत होती है। जिसके 2020 तक 2 करोड़ मैट्रिक टन पहुंचने की संभावना है। अकेले महाराष्ट्र में रोजाना करीब 1800 टन का प्लास्टिक कचरा पैदा होता है। इस कचरे से हमारे पर्यावरण को नुकसान पहुंचता है। साथ ही प्लास्टिक हमारी सेहत के लिए भी हानिकारक है। प्लास्टिक के कणों से कैंसर होने का खतरा रहता है। साथ ही प्लास्टिक बैग में खाना रखने से हानिकारक तत्व जाने का भी खतरा होता है।

ज्यादातर चीजों में प्लास्टिक की खपत होने की वजह से इसका इस्तेमाल पूरी तरह से खत्म करना मुश्किल है। ऐसे में जरूरी है कि हम प्लास्टिक के विकल्पों पर ध्यान दें। सब्जी लेते समय हम प्लास्टिक बैग के बजाए जूट या कपड़े का बैग इस्तेमाल कर सकते हैं। प्लास्टिक प्लेट या थर्मोकॉल प्लेट भी पार्टियों में इस्तेमाल किए जाते हैं। इसकी बजाए हम पेपर प्लेट या सेरेमिक प्लेट का इस्तेमाल कर सकते हैं। गर्मियों में लोगों के लिए प्लास्टिक का बोतल बंद पानी खरीदना आसान होता है। लेकिन हाल में न्यूयॉर्क स्टेट यूनिवर्सिटी की रिपोर्ट में खुलासा हुआ है कि बोतल बंद पानी में प्लास्टिक के माइक्रो कण मिल जाते हैं जो आपकी सेहत पर बुरा असर डाल सकते हैं। ऐसे में घर से ही ग्लास की बोतल में पानी ले जाना बेहतर विकल्प है। या फिर स्टील की बोतल में भी पानी पी सकते हैं। ग्राहकों को चाय, शिकंजी, लस्सी, कॉफी देने के लिए दुकानदार प्लास्टिक कप के बजाए पेपर कप या कुल्हड़ का इस्तेमाल कर सकते हैं। इसके साथ-साथ प्लास्टिक को रिसाइकिल करना प्लास्टिक वेस्ट से निपटने का सबसे अच्छा तरीका है।

मुंबई, दिल्ली समेत कई राज्यों ने पॉलिथीन और प्लास्टिक से बनी चीजों पर रोक लगाई गई है। वातावरण को प्लास्टिक मुक्त करने के लिए सरकार को कदम उठा ही रही है। लेकिन जरूरी है कि हम भी अपनी आदतों को बदलें और प्लास्टिक के दूसरे वकिल्पों को अपनी जिंदगी में अपनाएं।

Discussion

1326.	A group of two or more non metals which have negative charge on it is calledA. RadicalB. ValencyC. Cation
Answer» ANSWER: RADICAL MARK as BRAINLEST PLZZZZZZZZ

1326.

A group of two or more non metals which have negative charge on it is calledA. RadicalB. ValencyC. Cation

Answer»

ANSWER:

RADICAL

MARK as BRAINLEST PLZZZZZZZZ

Discussion

1327.	Problem #2 A photographic "stop bath" contains 160mL of pure acetic acidHC²H³O², in 650ml solution. What is the v/v concentration of acetic acidin the stop bath?
Answer» ANSWER: I am not able to UNDERSTAND your question so keep it again SORRY

1327.

Problem #2 A photographic "stop bath" contains 160mL of pure acetic acidHC²H³O², in 650ml solution. What is the v/v concentration of acetic acidin the stop bath?

Answer»

ANSWER:

I am not able to UNDERSTAND your question so keep it again SORRY

Discussion

1328.	PICK out the non-reactive element from below. Single choice.(1 Point)ArsenicArgonArgentum
Answer» ANSWER: B. argon Explanation: is the answer WELL HOPE this is the answer

1328.

PICK out the non-reactive element from below. Single choice.(1 Point)ArsenicArgonArgentum

Answer»

ANSWER:

B. argon

Explanation:

is the answer WELL HOPE this is the answer

Discussion

1329.	Identify the most reactive and least reactive metal amongst the following:Al, K, Cu, Au.
Answer» ANSWER: most reactive metal is POTASSIUM and the least reactive metal is AU

1329.

Identify the most reactive and least reactive metal amongst the following:Al, K, Cu, Au.

Answer»

ANSWER:

most reactive metal is POTASSIUM and the least reactive metal is AU

Discussion

1330.	The element with variable valency.. Single choice.(1 Point)IronCopperBoth
Answer» ANSWER: both is your answer MAYBE it's HELPFUL for you ☺️

1330.

The element with variable valency.. Single choice.(1 Point)IronCopperBoth

Answer»

ANSWER:

both is your answer

MAYBE it's HELPFUL for you ☺️

Discussion

1331.	Which of the following is used as a preservative.options.NitratesGlycerineTerylene
Answer» ANSWER: the CORRECT answer is glycerine hope it helps please MARK as BRAINLIEST

1331.

Which of the following is used as a preservative.options.NitratesGlycerineTerylene

Answer»

ANSWER:

the CORRECT answer is glycerine

hope it helps

please MARK as BRAINLIEST

Discussion

1332.	Rani had kept naphthalene balls in her woollen last year .When she opened the trunk the ball were missing. Where did the naphthalene ball vanish?for class 6
Answer» Naphthalene balls disappear with TIME without leaving any SOLID. Naphthalene undergoes SUBLIMATION easily i.e., the change of STATE of naphthalene from solid to gas without the intervention of the liquid state. plz mark as brainlist and follow me

1332.

Rani had kept naphthalene balls in her woollen last year .When she opened the trunk the ball were missing. Where did the naphthalene ball vanish?for class 6

Answer»

Naphthalene balls disappear with TIME without leaving any SOLID. Naphthalene undergoes SUBLIMATION easily i.e., the change of STATE of naphthalene from solid to gas without the intervention of the liquid state.

plz mark as brainlist and follow me

Discussion

1333.	OBJECTIVE TYPE QUESTIONSAtomic StructureQ.I FIII in the blanks with the correct words from the brackets.1. A molecule of an element isſwater /chlorine/ ammonia]2. A radical with one atom of sulphur & three atoms of oxygen is[bisulphite/sulphate/sulphite)3. An element with variable valency is(sodium/copper/calcium]4. The formula of aluminium sulphate is(AISO/Al2(SO3)3/A12(SO4)21.5 The element lithium in the Modern Periodic Table with valency 1* belongs to the[2/1]
Answer» Answer: 1-copper 2 SULPHITE 4 AIAISO 3 CALCIUM

1333.

OBJECTIVE TYPE QUESTIONSAtomic StructureQ.I FIII in the blanks with the correct words from the brackets.1. A molecule of an element isſwater /chlorine/ ammonia]2. A radical with one atom of sulphur & three atoms of oxygen is[bisulphite/sulphate/sulphite)3. An element with variable valency is(sodium/copper/calcium]4. The formula of aluminium sulphate is(AISO/Al2(SO3)3/A12(SO4)21.5 The element lithium in the Modern Periodic Table with valency 1* belongs to the[2/1]

Answer»

Answer:

1-copper

2 SULPHITE

4 AIAISO 3 CALCIUM

Discussion

1334.	6.MCQ with more than one correct answer :According to Mulliken, electronegativity of the element isa) Average of ionization energy and electron affinityb) EN =IE-EA/2C) EN =IE+EA/2d) EA=EA+IE/6please answer my question
Answer» ANSWER: EXPLANATION: B)

1334.

6.MCQ with more than one correct answer :According to Mulliken, electronegativity of the element isa) Average of ionization energy and electron affinityb) EN =IE-EA/2C) EN =IE+EA/2d) EA=EA+IE/6please answer my question

Answer»

ANSWER:

EXPLANATION:

B)

Discussion

1335.	3) Mention the Molecule which shouls bolasCablent bond3) Cach 4 Hol1 C₂ Hynormales shows polas2) Bech
Answer» ANSWER: fadudkvkae Explanation: urduguckfgg

1335.

3) Mention the Molecule which shouls bolasCablent bond3) Cach 4 Hol1 C₂ Hynormales shows polas2) Bech

Answer»

ANSWER:

fadudkvkae

Explanation:

urduguckfgg

Discussion

1336.	33. आगे नदिया पड़ी अपार,घोड़ा कैसे उतरे पारराणा ने सोचा इस पार,तब तक चेतक था उस पार।। -इस उदाहरण में किस अलंकार का प्रयोग है।O(क)श्लेषO (ख)उत्प्रेक्षाO (ग)अतिशयोक्तिO (घ)उपमा
Answer» Answer: d Explanation: L HOPE this HELPS you OK BYE

1336.

33. आगे नदिया पड़ी अपार,घोड़ा कैसे उतरे पारराणा ने सोचा इस पार,तब तक चेतक था उस पार।। -इस उदाहरण में किस अलंकार का प्रयोग है।O(क)श्लेषO (ख)उत्प्रेक्षाO (ग)अतिशयोक्तिO (घ)उपमा

Answer»

Answer:

d

Explanation:

L HOPE this HELPS you OK BYE

Discussion

1337.	Take a glass of water . Add two spoons of chalk powder in it and mix it well . What kind of mixture is this ? Name the other kind of mixture and mention any one major difference between the two .very urgent fast
Answer» ANSWER: it will we INSOLUBLE substance sand and WATER

1337.

Take a glass of water . Add two spoons of chalk powder in it and mix it well . What kind of mixture is this ? Name the other kind of mixture and mention any one major difference between the two .very urgent fast

Answer»

ANSWER:

it will we INSOLUBLE substance

sand and WATER

Discussion

1338.	8. Assertion(A): Critical temperature of CO2 is greater than that of O2Reason(R): Intermolecular force of attractionof CO2 is more than that of O2a) Both A and R are true and R is correct explanation of A.b) Both A and R are true and R is not correct explanation of A.C) A is true and R is falsed) A is false and R is true.
Answer» I GUESS A hope it HELP s......

1338.

8. Assertion(A): Critical temperature of CO2 is greater than that of O2Reason(R): Intermolecular force of attractionof CO2 is more than that of O2a) Both A and R are true and R is correct explanation of A.b) Both A and R are true and R is not correct explanation of A.C) A is true and R is falsed) A is false and R is true.

Answer»

I GUESS A

hope it HELP s......

Discussion

1339.	Please answer the questions:(a), (b), (c) and (d)I WILL MARK IT THE BRAINLIEST AND ALSO FOLLOW YOU..
Answer» Explanation: 1...Mg₃N₂ 2..Al₂(SO₄)₃ 3..H4Na2O4Zn 4...H2O6S2Zn 5...FE(OH)3 Were you asking in this manner? HOPE it HELPS..

1339.

Please answer the questions:(a), (b), (c) and (d)I WILL MARK IT THE BRAINLIEST AND ALSO FOLLOW YOU..

Answer»

Explanation:

1...Mg₃N₂

2..Al₂(SO₄)₃

3..H4Na2O4Zn

4...H2O6S2Zn

5...FE(OH)3

Were you asking in this manner?

HOPE it HELPS..

Discussion

1340.	Que Melting point of four solid A,B,C and D are 14K 280K 500K and 400K The Interparticle force of attraction are in the order.a) A
Answer» Answer: 3. b 2. b 1.d is. RIGHT my THINK

1340.

Que Melting point of four solid A,B,C and D are 14K 280K 500K and 400K The Interparticle force of attraction are in the order.a) A

Answer»

Answer:

3. b

2. b

1.d

is. RIGHT my THINK

Discussion

1341.	Q.a) The solubility of copper sulphate (in 100g of water) at different temperatures is given in the following table--Observe the table and state what inference can be drawn from the given data?b) A solution was prepared by dissolving 36.5 g of sugar in water to make the solution 355g.Calculate its concentration in mass by mass percentage?
Answer» ANSWER: HAHAHAHAHA WEEK sfk7eadjo7yter

1341.

Q.a) The solubility of copper sulphate (in 100g of water) at different temperatures is given in the following table--Observe the table and state what inference can be drawn from the given data?b) A solution was prepared by dissolving 36.5 g of sugar in water to make the solution 355g.Calculate its concentration in mass by mass percentage?

Answer»

ANSWER:

HAHAHAHAHA WEEK sfk7eadjo7yter

Discussion

1342.	You are provided with soda water, milk. How can you differentiate between them in termsof i) Homogeneity ii) Filtration iii) Tyndall effect?
Answer» I)homogeny (BIOLOGY) similarity because of common evolution ii)Filtration is the process of separating SUSPENDED solid matter from a liquid, by causing the latter to pass through the pores of some substance, called a filter. The liquid which has PASSED through the filter is called the filtrate. iii)Tyndall effect, ALSO called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window. like my answers and mark me as a brilliant

1342.

You are provided with soda water, milk. How can you differentiate between them in termsof i) Homogeneity ii) Filtration iii) Tyndall effect?

Answer»

I)homogeny (BIOLOGY) similarity because of common evolution

ii)Filtration is the process of separating SUSPENDED solid matter from a liquid, by causing the latter to pass through the pores of some substance, called a filter. The liquid which has PASSED through the filter is called the filtrate.

iii)Tyndall effect, ALSO called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window.

like my answers and mark me as a brilliant

Discussion

1343.	Write word equations for thefollowing skeletal collationa KClO ₃ KCI+O2please do not write unnecessary things
Answer» ANSWER: 2KClO3 → 2KCL+ 3O2 Is the answer,,,,,,,

1343.

Write word equations for thefollowing skeletal collationa KClO ₃ KCI+O2please do not write unnecessary things

Answer»

ANSWER:

2KClO3 → 2KCL+ 3O2

Is the answer,,,,,,,

Discussion

1344.	'A'a) Oxalic Acidb) Generatorsc) Artificial jewelry'B'1) EMI2) Weak Electrolyte3) Strong Electrolyte4) Electroplating
Answer» A] C] Artificial jewelry B] a] EMI

1344.

'A'a) Oxalic Acidb) Generatorsc) Artificial jewelry'B'1) EMI2) Weak Electrolyte3) Strong Electrolyte4) Electroplating

Answer»

A] C] Artificial jewelry

B] a] EMI

Discussion

1345.	Write one similarity and one difference between the nutritionin amoeba and human beings.lobortori
Answer» Answer: Similarity: Both Amoeba and human beings are heterotrophs and derive nutrition from other organisms. Dissimilarity: Human beings have a COMPLEX DIGESTIVE system and different nutrients are digested in SEPARATE regions. Amoeba does not have a digestive system and all the nutrients are digested in the FOOD vacuole.

1345.

Write one similarity and one difference between the nutritionin amoeba and human beings.lobortori

Answer»

Answer:

Similarity: Both Amoeba and human beings are heterotrophs and derive nutrition from other organisms. Dissimilarity: Human beings have a COMPLEX DIGESTIVE system and different nutrients are digested in SEPARATE regions. Amoeba does not have a digestive system and all the nutrients are digested in the FOOD vacuole.

Discussion

1346.	3. Match the following.Column A(a) Evaporation ofwaterColumn B(i) Non-periodic(b) Milk turning sour(c) Earthquake(d) Change of seasons(e) Glowing of bulbchange(ii) Periodic change(iii) Chemical change(iv) Physical change(v) Reversible change
Answer» ANSWER: d CHANGES of SEASON PERIODIC CHANGE

1346.

3. Match the following.Column A(a) Evaporation ofwaterColumn B(i) Non-periodic(b) Milk turning sour(c) Earthquake(d) Change of seasons(e) Glowing of bulbchange(ii) Periodic change(iii) Chemical change(iv) Physical change(v) Reversible change

Answer»

ANSWER:

d CHANGES of SEASON

PERIODIC CHANGE

Discussion

1347.	Q4. Write balanced equation for thefollowing word equations(5)(1) Aluminium +hydrochloricacid ---->Aluminium chloride+hydrogen(ii) Nitrogen +hydrogen --->Ammonia(iii)Barium chloride +Sodium sulphate----->Barium sulphate + Sodiumchloride(iv)Iron+Chlorine.-.-.->Ferric chloride(v)Sodium oxide +
Answer» Answer: follow in my INSTAGRAM PAGE nice QUESTION

1347.

Q4. Write balanced equation for thefollowing word equations(5)(1) Aluminium +hydrochloricacid ---->Aluminium chloride+hydrogen(ii) Nitrogen +hydrogen --->Ammonia(iii)Barium chloride +Sodium sulphate----->Barium sulphate + Sodiumchloride(iv)Iron+Chlorine.-.-.->Ferric chloride(v)Sodium oxide +

Answer»

Answer:

follow in my INSTAGRAM PAGE nice QUESTION

Discussion

1348.	II. Tick the points which are a remedy to air pollution:1. Burn crackers.__2. Grow more trees.___3. Use maximum vehicles.__4. Use clean fuels.___5. Use vehicles with catalytic converters.__6. Bring deforestation.__7. Set-up more industries on crop land.__
Answer» Answer: GROW more TREES USE CLEAN fuels

1348.

II. Tick the points which are a remedy to air pollution:1. Burn crackers.2. Grow more trees._3. Use maximum vehicles.4. Use clean fuels._5. Use vehicles with catalytic converters.6. Bring deforestation.7. Set-up more industries on crop land.__

Answer»

Answer:

GROW more TREES

USE CLEAN fuels

Discussion

1349.	K. In CuSO,5H,O the percentage of wateris ......(Cu = 63.5, S = 32, 0 = 16, H= 1)b. 36 %d. 72 %nrnnerties of aa. 10 %c. 60%System
Answer» Molar mass CF CuSO₄.5H₂O = [64 + 32 + (16 x 4)+ 5 (2 x 1 + 16)] = 250 Mass of water of crystallisation = 5 ( 2 x 1 + 16) = 90 % of water of crystallisation = $\frac{90}{250} \times100$ = 36% Please MARK me BRAINLIEST

1349.

K. In CuSO,5H,O the percentage of wateris ......(Cu = 63.5, S = 32, 0 = 16, H= 1)b. 36 %d. 72 %nrnnerties of aa. 10 %c. 60%System

Answer»

Molar mass CF CuSO₄.5H₂O = [64 + 32 + (16 x 4)+ 5 (2 x 1 + 16)] = 250

Mass of water of crystallisation = 5 ( 2 x 1 + 16) = 90

% of water of crystallisation = $\frac{90}{250} \times100$ = 36%

Please MARK me BRAINLIEST

Discussion

1350.	K. In CuSO4.5H2O the percentage of wateris ......(Cu = 63.5, S = 32, O = 16, H= 1)b. 36 %d. 72 %a. 10 %c. 60 %
Answer» PERCENTAGE of WATER is 10%

Discussion

Explore topic-wise InterviewSolutions in .

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226Ra88 undergoes alpha-decay, its half-life is 1620 years. What is the rate ofdisintegration of 0.01 gm sample of 226 Ra88? [Ans: 3.61374 x 10^8 dps]​

Please Donot given me the wrong answerplease solve the all answer and Do not give me wrong who give me wright answer and full answer I will follow you​

Pls mark me as brainliest if you are helped..... thank you

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Problem #2 A photographic "stop bath" contains 160mL of pure acetic acidHC²H³O², in 650ml solution. What is the v/v concentration of acetic acidin the stop bath?​

PICK out the non-reactive element from below. Single choice.(1 Point)ArsenicArgonArgentum​

Identify the most reactive and least reactive metal amongst the following:Al, K, Cu, Au.

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Rani had kept naphthalene balls in her woollen last year .When she opened the trunk the ball were missing. Where did the naphthalene ball vanish?for class 6​

plz mark as brainlist and follow me

6.MCQ with more than one correct answer :According to Mulliken, electronegativity of the element isa) Average of ionization energy and electron affinityb) EN =IE-EA/2C) EN =IE+EA/2d) EA=EA+IE/6please answer my question ​

3) Mention the Molecule which shouls bolasCablent bond3) Cach 4 Hol1 C₂ Hynormales shows polas2) Bech​

Take a glass of water . Add two spoons of chalk powder in it and mix it well . What kind of mixture is this ? Name the other kind of mixture and mention any one major difference between the two .very urgent fast ​

Please answer the questions:(a), (b), (c) and (d)I WILL MARK IT THE BRAINLIEST AND ALSO FOLLOW YOU.. ​

Que Melting point of four solid A,B,C and D are 14K 280K 500K and 400K The Interparticle force of attraction are in the order.a) A

You are provided with soda water, milk. How can you differentiate between them in termsof i) Homogeneity ii) Filtration iii) Tyndall effect?

Write word equations for thefollowing skeletal collationa KClO ₃ KCI+O2please do not write unnecessary things ​

'A'a) Oxalic Acidb) Generatorsc) Artificial jewelry'B'1) EMI2) Weak Electrolyte3) Strong Electrolyte4) Electroplating

Write one similarity and one difference between the nutritionin amoeba and human beings.lobortori​

3. Match the following.Column A(a) Evaporation ofwaterColumn B(i) Non-periodic(b) Milk turning sour(c) Earthquake(d) Change of seasons(e) Glowing of bulbchange(ii) Periodic change(iii) Chemical change(iv) Physical change(v) Reversible change​

Q4. Write balanced equation for thefollowing word equations(5)(1) Aluminium +hydrochloricacid ---->Aluminium chloride+hydrogen(ii) Nitrogen +hydrogen --->Ammonia(iii)Barium chloride +Sodium sulphate----->Barium sulphate + Sodiumchloride(iv)Iron+Chlorine.-.-.->Ferric chloride(v)Sodium oxide +​

II. Tick the points which are a remedy to air pollution:1. Burn crackers.__2. Grow more trees.___3. Use maximum vehicles.__4. Use clean fuels.___5. Use vehicles with catalytic converters.__6. Bring deforestation.__7. Set-up more industries on crop land.__​

K. In CuSO,5H,O the percentage of wateris ......(Cu = 63.5, S = 32, 0 = 16, H= 1)b. 36 %d. 72 %nrnnerties of aa. 10 %c. 60%System​

K. In CuSO4.5H2O the percentage of wateris ......(Cu = 63.5, S = 32, O = 16, H= 1)b. 36 %d. 72 %a. 10 %c. 60 %​

226Ra88 undergoes alpha-decay, its half-life is 1620 years. What is the rate ofdisintegration of 0.01 gm sample of 226 Ra88? [Ans: 3.61374 x 10^8 dps]

Please Donot given me the wrong answerplease solve the all answer and Do not give me wrong who give me wright answer and full answer I will follow you

Vii) Which indicator willproduce a pink colour onadding a few drops of sodiumhydroxide solution? *O blue litmusO phenolphthaleinO turmericO china rose indicator

1vi) The gas which turns limewater milky is :O sulphur dioxideO nitrogen dioxideO hydrogen chlorideO carbon dioxide

Liquids evaporate on heating. Give reason.No spam otherwise I will report it .....plzz give the answer fast plzzzz plzzzz plzzzz

26.Which of the following is correct about the given picture?(A) It is a part of the nervous system. (B) It is a part of the digestive system,(C) It is a part of the skeletal system. (D) It is a part of the excretory system.(E) None of the these

5. Balance the following chemical equations :(a) FeS + HCl → FeCl, + H S(b) Na CO2 +2HCl NaCl + H,O + CO2(c)2H, + O2 +24,0(d) Na O + H2O + NaOH

Choose the False statement.. Single choice.(1 Point)All metallic ions are CationsAcid radicals are Anions

How much water is used in washingi) utensilsii) clothesiii) moppingiv) toiletsv) cookingvi) photosynthesisvii) washing homes

I)ii)How many atoms are present in PO ion?What is polyatomic ion? Give examples?ofCalculate the molar or mose ofc. 1.2

The molecular formula of the Oxide , Chloride and sulphide of Lead. choose the correct option.. Single choice.(2 Points)PbO2 , PbS , PbClPbO , PbCl2 , PbSPbO , PbCl , PbS

What will be the correct Electronic configuration of Argon ( atomic no. 18 ) and its valency ?. Single choice.(2 Points)( 2,8,4,2) valency =2( 2,8,8 ) valency = 8( 2,8,8 ) valency = 0

This question is only for 11th - 12th and graduated students / TeachersWhen Thompson was so intelligent to discover an Electron then Why he didn't discover a proton because Rutherford done the same experiment and made a hole on Cathode side instead of annode side ??

A group of two or more non metals which have negative charge on it is calledA. RadicalB. ValencyC. Cation

Problem #2 A photographic "stop bath" contains 160mL of pure acetic acidHC²H³O², in 650ml solution. What is the v/v concentration of acetic acidin the stop bath?

PICK out the non-reactive element from below. Single choice.(1 Point)ArsenicArgonArgentum

The element with variable valency.. Single choice.(1 Point)IronCopperBoth

Which of the following is used as a preservative.options.NitratesGlycerineTerylene

Rani had kept naphthalene balls in her woollen last year .When she opened the trunk the ball were missing. Where did the naphthalene ball vanish?for class 6

6.MCQ with more than one correct answer :According to Mulliken, electronegativity of the element isa) Average of ionization energy and electron affinityb) EN =IE-EA/2C) EN =IE+EA/2d) EA=EA+IE/6please answer my question

3) Mention the Molecule which shouls bolasCablent bond3) Cach 4 Hol1 C₂ Hynormales shows polas2) Bech

Take a glass of water . Add two spoons of chalk powder in it and mix it well . What kind of mixture is this ? Name the other kind of mixture and mention any one major difference between the two .very urgent fast

Please answer the questions:(a), (b), (c) and (d)I WILL MARK IT THE BRAINLIEST AND ALSO FOLLOW YOU..

Write word equations for thefollowing skeletal collationa KClO ₃ KCI+O2please do not write unnecessary things

Write one similarity and one difference between the nutritionin amoeba and human beings.lobortori

3. Match the following.Column A(a) Evaporation ofwaterColumn B(i) Non-periodic(b) Milk turning sour(c) Earthquake(d) Change of seasons(e) Glowing of bulbchange(ii) Periodic change(iii) Chemical change(iv) Physical change(v) Reversible change

Q4. Write balanced equation for thefollowing word equations(5)(1) Aluminium +hydrochloricacid ---->Aluminium chloride+hydrogen(ii) Nitrogen +hydrogen --->Ammonia(iii)Barium chloride +Sodium sulphate----->Barium sulphate + Sodiumchloride(iv)Iron+Chlorine.-.-.->Ferric chloride(v)Sodium oxide +

II. Tick the points which are a remedy to air pollution:1. Burn crackers.2. Grow more trees._3. Use maximum vehicles.4. Use clean fuels._5. Use vehicles with catalytic converters.6. Bring deforestation.7. Set-up more industries on crop land.__

K. In CuSO,5H,O the percentage of wateris ......(Cu = 63.5, S = 32, 0 = 16, H= 1)b. 36 %d. 72 %nrnnerties of aa. 10 %c. 60%System

K. In CuSO4.5H2O the percentage of wateris ......(Cu = 63.5, S = 32, O = 16, H= 1)b. 36 %d. 72 %a. 10 %c. 60 %