52639 + Interview Questions in Secondary School in Chemistry Page 27 InterviewSolution

1301.	Please tell me the valency of bromine. PLZ be fast
Answer» Answer: Atomic number of BROMINE is 35 . It have 7 VALENCE ELECTRONS in outer most shell . VALENCY =1

1301.

Please tell me the valency of bromine. PLZ be fast

Answer»

Answer:

Atomic number of BROMINE is 35 .

It have 7 VALENCE ELECTRONS in outer most shell .

VALENCY =1

Discussion

1302.	The decomposition of NH₃ on platinum surface is zero order reaction. What are the rates of production of N₂ and H₂ respectively if k = 2.5 × 10⁻⁴ mol⁻¹ L s⁻¹? *(a) 2.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹(b) 5.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹(c) 7.5 × 10⁻⁴ molL⁻¹ s⁻¹and 2.5 × 10⁻⁴ molL⁻¹ s⁻¹(d) 8.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹
Answer» Explanation: 2.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹ (B) 5.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7. 5 × 10⁻⁴ molL⁻¹ s⁻¹ (C) 7.5 × 10⁻⁴ molL⁻¹ s⁻¹and 2.5 × 10⁻⁴ molL⁻¹ s⁻¹ (d) 8.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹

1302.

The decomposition of NH₃ on platinum surface is zero order reaction. What are the rates of production of N₂ and H₂ respectively if k = 2.5 × 10⁻⁴ mol⁻¹ L s⁻¹? *(a) 2.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹(b) 5.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹(c) 7.5 × 10⁻⁴ molL⁻¹ s⁻¹and 2.5 × 10⁻⁴ molL⁻¹ s⁻¹(d) 8.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹

Answer»

Explanation:

2.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹

(B) 5.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.

5 × 10⁻⁴ molL⁻¹ s⁻¹

(C) 7.5 × 10⁻⁴ molL⁻¹ s⁻¹and 2.5 × 10⁻⁴ molL⁻¹ s⁻¹

(d) 8.5 × 10⁻⁴ molL⁻¹ s⁻¹and 7.5 × 10⁻⁴ molL⁻¹ s⁻¹

Discussion

1303.	What you mean by atomic numberp
Answer» *protons* protonsAtomic number, the number of a CHEMICAL element in the periodic system, WHEREBY the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is ALSO the atomic number.

1303.

What you mean by atomic numberp

Answer»

protons

protonsAtomic number, the number of a CHEMICAL element in the periodic system, WHEREBY the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is ALSO the atomic number.

Discussion

1304.	Nimanlikhit ke sootr ko kya kehte h
Answer» ANSWER: I am REALLY SORRY Explanation: I am really sorry I am really sorry I am really

1304.

Nimanlikhit ke sootr ko kya kehte h

Answer»

ANSWER:

I am REALLY SORRY

Explanation:

I am really sorry I am really sorry I am really

Discussion

1305.	Name a metal which is bad conducter of electricity
Answer» ANSWER: Tungsten is a metal which is a BAD conductor of heat and electricity. Explanation: hence this is your answer DEAR. please mark me BRAINLIEST

1305.

Name a metal which is bad conducter of electricity

Answer»

ANSWER:

Tungsten is a metal which is a BAD conductor of heat and electricity.

Explanation:

hence this is your answer DEAR. please mark me BRAINLIEST

Discussion

1306.	Define pollination and its types.thanku so much ❤
Answer» Answer: Pollination: Pollination is the process of transfer of pollen grains from ANTHER to stigma. The TWO TYPES of pollination found in flowering plants are: Self pollination: that occurs within the same plant. Cross-pollination: that occurs between two flowers of two different plants but of the same kind Explanation: please GIVE me brainlest

1306.

Define pollination and its types.thanku so much ❤

Answer»

Answer:

Pollination: Pollination is the process of transfer of pollen grains from ANTHER to stigma. The TWO TYPES of pollination found in flowering plants are: Self pollination: that occurs within the same plant. Cross-pollination: that occurs between two flowers of two different plants but of the same kind

Explanation:

please GIVE me brainlest

Discussion

1307.	8.Seema visited a Natural Gas Compressing Unit and found that the gas can beliquefied under specific conditions of temperature and pressure. While sharingher experience with friends she got confused. Help her to identify the correctset of conditions(a)Low temperature, low pressure(b) high temperature, low pressure© Low temperature, high pressure(d) High temperature, high pressure
Answer» Answer: d. high PRESSURE and high temp as it is being compromised EXPLANATION: i will much appreciate if you could MARK me bbrainliest TY

1307.

8.Seema visited a Natural Gas Compressing Unit and found that the gas can beliquefied under specific conditions of temperature and pressure. While sharingher experience with friends she got confused. Help her to identify the correctset of conditions(a)Low temperature, low pressure(b) high temperature, low pressure© Low temperature, high pressure(d) High temperature, high pressure

Answer»

Answer:

d. high PRESSURE and high temp as it is being compromised

EXPLANATION:

i will much appreciate if you could MARK me bbrainliest TY

Discussion

1308.	What is (Sho-- jpo vark jmf) matter?
Answer» EXPLANATION: hagayushdgsusisjgsysisoajzhzvvz

1308.

What is (Sho-- jpo vark jmf) matter?

Answer»

EXPLANATION:

hagayushdgsusisjgsysisoajzhzvvz

Discussion

1309.	What is the valency of neon and and it's electronic configuration? show by using spdf method.
Answer» Answer: SPDF may REFER to: ELECTRON CONFIGURATION, for which there is an obsolete system of categorizing spectral lines as "Sharp", "Principal", "Diffuse" and "Fundamental". These are also referred as sub shells or Orbitals. Explanation: HENCE this is your answer dear. please MARK me brainliest

1309.

What is the valency of neon and and it's electronic configuration? show by using spdf method.

Answer»

Answer:

SPDF may REFER to: ELECTRON CONFIGURATION, for which there is an obsolete system of categorizing spectral lines as "Sharp", "Principal", "Diffuse" and "Fundamental". These are also referred as sub shells or Orbitals.

Explanation:

HENCE this is your answer dear. please MARK me brainliest

Discussion

1310.	Describe solidification with an example
Answer» Answer: Solidification, ALSO known as FREEZING, is a phase change of matter that results in the production of a solid. Generally, this occurs when the temperature of a LIQUID is lowered below its freezing point. Although the freezing point and melting point of most materials are the same temperature, this is not the case for all substances, so freezing point and melting point are not necessarily interchangeable terms. For example, agar (a chemical used in food and the laboratory) melts at 85 C (185 F) yet solidifies from 31 C to 40 C (89.6 F to 104 F). Explanation: hello Didi can we be friends Didi ? to kaise he aplog !

1310.

Describe solidification with an example

Answer»

Answer:

Solidification, ALSO known as FREEZING, is a phase change of matter that results in the production of a solid. Generally, this occurs when the temperature of a LIQUID is lowered below its freezing point. Although the freezing point and melting point of most materials are the same temperature, this is not the case for all substances, so freezing point and melting point are not necessarily interchangeable terms. For example, agar (a chemical used in food and the laboratory) melts at 85 C (185 F) yet solidifies from 31 C to 40 C (89.6 F to 104 F).

Explanation:

hello Didi

can we be friends Didi ?

to kaise he aplog !

Discussion

1311.	Ethylene can be obtained from____
Answer» Answer: Ethylene is PRODUCED by several methods in the petrochemical industry. ... In Europe and Asia, ethylene is obtained MAINLY from cracking naphtha, gasoil and condensates with the COPRODUCTION of propylene, C4 olefins and aromatics (pyrolysis GASOLINE).

1311.

Ethylene can be obtained from____

Answer»

Answer:

Ethylene is PRODUCED by several methods in the petrochemical industry. ... In Europe and Asia, ethylene is obtained MAINLY from cracking naphtha, gasoil and condensates with the COPRODUCTION of propylene, C4 olefins and aromatics (pyrolysis GASOLINE).

Discussion

1312.	a substance can be beaten into sheets and beaten into wires what will you call it a it is both malleable and ductile is it correctly
Answer» ANSWER: The property by the virtue of which they can be beaten into thin sheets is called malleability and the property by the virtue of which they can be drawn into wires is called DUCTILITY. Answer VERIFIED by Toppr.

1312.

a substance can be beaten into sheets and beaten into wires what will you call it a it is both malleable and ductile is it correctly

Answer»

ANSWER:

The property by the virtue of which they can be beaten into thin sheets is called malleability and the property by the virtue of which they can be drawn into wires is called DUCTILITY. Answer VERIFIED by Toppr.

Discussion

1313.	Why does tooth decay start when the pH is less than 5.5 ?
Answer» Answer: The tooth decay got started when acids are PRODUCED by action of bacteria on sugars and food PARTICLES which TEND to soften the enamel. Bacteria in the MOUTH produce acids by the process of oxidation and the tooth decay STARTS when pH of mouth is below 5.5

1313.

Why does tooth decay start when the pH is less than 5.5 ?

Answer»

Answer:

The tooth decay got started when acids are PRODUCED by action of bacteria on sugars and food PARTICLES which TEND to soften the enamel. Bacteria in the MOUTH produce acids by the process of oxidation and the tooth decay STARTS when pH of mouth is below 5.5

Discussion

1314.	7.Which one of the following sets of phenomena would increase on raising thetemperature?(a)Diffusion, evaporation, compression of gases(b), compression of gases, solubility© Evaporation, diffusion, expansion of gases(d) Evaporation,solubility, diffusion, compression of gases
Answer» ANSWER: the RIGHT answer is (d).

1314.

7.Which one of the following sets of phenomena would increase on raising thetemperature?(a)Diffusion, evaporation, compression of gases(b), compression of gases, solubility© Evaporation, diffusion, expansion of gases(d) Evaporation,solubility, diffusion, compression of gases

Answer»

ANSWER:

the RIGHT answer is (d).

Discussion

1315.	The oxides of very reactive metals are reduced to metals by
Answer» Answer: Very reactive metals, such as aluminium, form STABLE OXIDES and other compounds. Electrolysis is commonly used to extract these metals and requires a LOT of electric CURRENT (energy) to reduce them to extract the metal. Less reactive metals, such as IRON, form less stable oxides and other compounds.

1315.

The oxides of very reactive metals are reduced to metals by

Answer»

Answer:

Very reactive metals, such as aluminium, form STABLE OXIDES and other compounds. Electrolysis is commonly used to extract these metals and requires a LOT of electric CURRENT (energy) to reduce them to extract the metal. Less reactive metals, such as IRON, form less stable oxides and other compounds.

Discussion

1316.	Solid have a definite shape.explain?
Answer»

Discussion

1317.	the worlds biggest economic unusual work was done by mr ancly masterly that was the biggest economics prank happenend ever in the world
Answer» ANSWER: GROSS DOMESTIC PRODUCT

1317.

the worlds biggest economic unusual work was done by mr ancly masterly that was the biggest economics prank happenend ever in the world

Answer»

ANSWER:

GROSS DOMESTIC PRODUCT

Discussion

1318.	5.Which of the following has highest kinetic energy?(a) Particles of ice at 0 °C(b) Particles of water at 0 °C© Particles of water at 100 °C(d) Particles of steam at 100 °C
Answer» ANSWER: (d) Particles of steam at 100 °C Explanation: HOPE it HELPS you please MARK me brainlist

1318.

5.Which of the following has highest kinetic energy?(a) Particles of ice at 0 °C(b) Particles of water at 0 °C© Particles of water at 100 °C(d) Particles of steam at 100 °C

Answer»

ANSWER:

(d) Particles of steam at 100 °C

Explanation:

HOPE it HELPS you

please MARK me brainlist

Discussion

1319.	Vii. When an excess of AgNO, is added to the complex one mole of AgCl is precipitated. The formula of the complex is a. [CoCl,(NH3).]C1 b. [COCI(NH3),] C1, C. [cocl3(nh3)3]D. [co(Nh3)4]cl3
Answer» ANSWER: udvdvbrjtbbfjsjeb rbfb Explanation: ndnfbkfnfvfjfnfbnf

1319.

Vii. When an excess of AgNO, is added to the complex one mole of AgCl is precipitated. The formula of the complex is a. [CoCl,(NH3).]C1 b. [COCI(NH3),] C1, C. [cocl3(nh3)3]D. [co(Nh3)4]cl3

Answer»

ANSWER:

udvdvbrjtbbfjsjeb rbfb

Explanation:

ndnfbkfnfvfjfnfbnf

Discussion

1320.	Painful sensation in the ear is usually at the level of
Answer» ANSWER: Most CAUSES of ear pain are non-life-threatening. Primary ear pain is more common than SECONDARY ear pain, and it is often due to infection or injury. The conditions that cause secondary (REFERRED) ear pain are broad and range from temporomandibular JOINT syndrome to inflammation of the throat.

1320.

Painful sensation in the ear is usually at the level of

Answer»

ANSWER:

Most CAUSES of ear pain are non-life-threatening. Primary ear pain is more common than SECONDARY ear pain, and it is often due to infection or injury. The conditions that cause secondary (REFERRED) ear pain are broad and range from temporomandibular JOINT syndrome to inflammation of the throat.

Discussion

1321.	Plss help kro plsss plss plss
Answer» ANSWER: 3 4 2 1 Explanation: these are RIGHT ANSWERS you can FILL them as your answer

1321.

Plss help kro plsss plss plss

Answer»

ANSWER:

3
4
2
1

Explanation:

these are RIGHT ANSWERS you can FILL them as your answer

Discussion

1322.	The period and group number of element with atomic number 7 area) 2,3b) 2,4c) 2,5d) 2,15
Answer» ANSWER: Atomic No. 7, is NITROGEN family which is in group 15

1322.

The period and group number of element with atomic number 7 area) 2,3b) 2,4c) 2,5d) 2,15

Answer»

ANSWER:

Atomic No. 7, is NITROGEN family which is in group 15

Discussion

1323.	what u all think if we closed the money system in the world no one dies because of hunger close the money system if u want to buy something from any shop he will give it without money if the shopkeeper wants anything he also got something in free the cycle moves like that money trading was to be totally closed are u all with me after this system no one is poor no one is richer all are same please think of it
Answer» is you are INDIAN LEO PREET

Discussion

1324.	Silk is considered to beIn attractive textilebecause of
Answer» Answer: It is because of the very notion of silk PRODUCES a luxurious and comfortable image in most people's minds. This is because of the fiber's WONDERFUL properties. The NATURAL protein structure MAKES it a NATURALLY hypoallergenic textile.. I hope it's help.. please mark me as brainliest..

1324.

Silk is considered to beIn attractive textilebecause of

Answer»

Answer:

It is because of the very notion of silk PRODUCES a luxurious and comfortable image in most people's minds. This is because of the fiber's WONDERFUL properties. The NATURAL protein structure MAKES it a NATURALLY hypoallergenic textile..

I hope it's help..

please mark me as brainliest..

Discussion

1325.	Describe in a few words ,how will u seperate a mixture of iodine,sand and iron piece
Answer» $\huge\red{\mid{\underline {\overline{\tt ❥Ꭺɴꮪꮃꭼꭱ࿐}}\mid}}$ $\huge\green{\mid{\underline {\overline{\tt By \ Sublimation}}\mid}}$ Hᴏᴘᴇ ɪᴛs ʜᴇʟᴘs ʏᴏᴜ ❤

1325.

Describe in a few words ,how will u seperate a mixture of iodine,sand and iron piece

Answer»

$\huge\red{\mid{\underline {\overline{\tt ❥Ꭺɴꮪꮃꭼꭱ࿐}}\mid}}$

$\huge\green{\mid{\underline {\overline{\tt By \ Sublimation}}\mid}}$

Hᴏᴘᴇ ɪᴛs ʜᴇʟᴘs ʏᴏᴜ ❤

Discussion

1326.	Silk is considered to beIn attractive textilebecause of
Answer» Answer: Silk is a natural protein fiber, some FORMS of which can be WOVEN into TEXTILES. The protein fiber of silk is composed mainly of fibroin and is produced by CERTAIN INSECT larvae to form cocoons.

1326.

Silk is considered to beIn attractive textilebecause of

Answer»

Answer:

Silk is a natural protein fiber, some FORMS of which can be WOVEN into TEXTILES. The protein fiber of silk is composed mainly of fibroin and is produced by CERTAIN INSECT larvae to form cocoons.

Discussion

1327.	NaOH+Cl2>NaCl+NaClO+H2O balance this chemical equation
Answer» ANSWER: the answer is OXYGEN HO2

1327.

NaOH+Cl2>NaCl+NaClO+H2O balance this chemical equation

Answer»

ANSWER:

the answer is OXYGEN HO2

Discussion

1328.	8. Calculate the molarity of solution of ethanol in water in which the mole fraction of ethanol is 0.25 (assume the density of water to be one).
Answer» ANSWER :- Molarity of the solution is 10 M . Explanation :- We have :- → Mole fraction of ETHANOL = 0.25 → Molar mass of ethanol = 46 g/mol → Molar mass of water = 18 g/mol ______________________________ We are GIVEN with 0.25 MOLES of ethanol, so the number of moles of water :- = 1 - 0.25 = 0.75 moles Mass of ethanol :- = No of moles × Molar mass = 0.25 × 46 = 11.5 g Mass of water :- = No of moles × Molar mass = 0.75 × 18 = 13.5 g Mass of the solution :- = (13.5 + 11.5)g = 25 g Volume of the solution :- = Mass/Density = 25/1 = 25 mL = 0.025 L ______________________________ Molarity of the solution :- = Moles of solute/Liters of solution = 0.25/0.025 = 250/25 = 10 M

1328.

8. Calculate the molarity of solution of ethanol in water in which the mole fraction of ethanol is 0.25 (assume the density of water to be one).

Answer»

ANSWER :-

Molarity of the solution is 10 M .

Explanation :-

We have :-

→ Mole fraction of ETHANOL = 0.25

→ Molar mass of ethanol = 46 g/mol

→ Molar mass of water = 18 g/mol

______________________________

We are GIVEN with 0.25 MOLES of ethanol, so the number of moles of water :-

= 1 - 0.25

= 0.75 moles

Mass of ethanol :-

= No of moles × Molar mass

= 0.25 × 46

= 11.5 g

Mass of water :-

= No of moles × Molar mass

= 0.75 × 18

= 13.5 g

Mass of the solution :-

= (13.5 + 11.5)g

= 25 g

Volume of the solution :-

= Mass/Density

= 25/1

= 25 mL

= 0.025 L

______________________________

Molarity of the solution :-

= Moles of solute/Liters of solution

= 0.25/0.025

= 250/25

= 10 M

Discussion

1329.	_______ is a technique used for separating the parts of mixture of either a gas or liquid solution.None of the givenChromatographyCinematographySeparatography
Answer» ANSWER: CHROMATOGRAPHY is the answer PLEASE MARK me as a BRAINLIST

1329.

_______ is a technique used for separating the parts of mixture of either a gas or liquid solution.None of the givenChromatographyCinematographySeparatography

Answer»

ANSWER:

CHROMATOGRAPHY is the answer PLEASE MARK me as a BRAINLIST

Discussion

1330.	Explain crystallization. What type of mixtures are separated by the technique ofcrystallization.
Answer» Answer: Crystallization is ALSO a chemical solid-liquid separation TECHNIQUE, in which mass transfer of a solute from the liquid solution to a PURE solid CRYSTALLINE phase occurs." Therefore, crystallization is used to separate a solid-liquid mixture.

1330.

Explain crystallization. What type of mixtures are separated by the technique ofcrystallization.

Answer»

Answer:

Crystallization is ALSO a chemical solid-liquid separation TECHNIQUE, in which mass transfer of a solute from the liquid solution to a PURE solid CRYSTALLINE phase occurs." Therefore, crystallization is used to separate a solid-liquid mixture.

Discussion

1331.	Name the following the method
Answer» Answer: 1. FLUSHING inert gases ( I don't KNOW single name) 2. condensation 3. Non SPONTANEOUS change ( I guess) 4. Element

1331.

Name the following the method

Answer»

Answer:

1. FLUSHING inert gases ( I don't KNOW single name)

2. condensation

3. Non SPONTANEOUS change ( I guess)

4. Element

Discussion

1332.	Give me answer Tick or cross
Answer» ANSWER: TICK (Pol science QUESTION THOUGH)

1332.

Give me answer Tick or cross

Answer»

ANSWER:

TICK (Pol science QUESTION THOUGH)

Discussion

1333.	5.6 L of a gas at STP weights equal to 4g. The vapour density of the gas is
Answer» ANSWER: This is REQUIRED SOLUTION to the QUESTION.

1333.

5.6 L of a gas at STP weights equal to 4g. The vapour density of the gas is

Answer»

ANSWER:

This is REQUIRED SOLUTION to the QUESTION.

Discussion

1334.	You have two solution "A" and "B" in water. The pH value of solution "A" is 6 and that of "B" is 8. Which solution will have a higher concentration of hydrogen ions? Which one of the solutions is acidic and which is basic?
Answer» Answer: A have HIGHER CONCENTRATION of H2 ions. A is acidic B is basic

1334.

You have two solution "A" and "B" in water. The pH value of solution "A" is 6 and that of "B" is 8. Which solution will have a higher concentration of hydrogen ions? Which one of the solutions is acidic and which is basic?

Answer»

Answer:

A have HIGHER CONCENTRATION of H2 ions.

A is acidic

B is basic

Discussion

1335.	What is the central atom hybridisation of XeO2F2
Answer» Answer: The hybridization of Xenon which is the central ATOM is sp3d. The central atom will contain 4 bond pairs and 1 lone PAIR. Xenon basically belongs to the noble gas family. What this MEANS is that it does not have to form any bonds to complete its octet Explanation:

1335.

What is the central atom hybridisation of XeO2F2

Answer»

Answer:

The hybridization of Xenon which is the central ATOM is sp3d. The central atom will contain 4 bond pairs and 1 lone PAIR. Xenon basically belongs to the noble gas family. What this MEANS is that it does not have to form any bonds to complete its octet

Explanation:

Discussion

1336.	What is sexual feeling ?
Answer» PLS STOP POSTING these TYPE of QUESTIONS

1336.

What is sexual feeling ?

Answer»

PLS STOP POSTING these TYPE of QUESTIONS

Discussion

1337.	The presence of which ion makes water harda) sodiumb) calciumc) potassiumd) sulphate
Answer» ANSWER: POTASSIUM is the answer

1337.

The presence of which ion makes water harda) sodiumb) calciumc) potassiumd) sulphate

Answer»

ANSWER:

POTASSIUM is the answer

Discussion

1338.	The raw material with which fibre is made up of
Answer» ANSWER: petrochemicals Explanation:

1338.

The raw material with which fibre is made up of

Answer»

ANSWER:

petrochemicals

Explanation:

Discussion

1339.	Which is highest electron gain enthalpy
Answer» ANSWER: a) FLUORINE (F)

1339.

Which is highest electron gain enthalpy

Answer»

ANSWER:

a) FLUORINE (F)

Discussion

1340.	(13)3 निम्न आँकड़ों की सहायता से समांतर माध्य ज्ञात कीजिए-वर्ग0-1010-2020-3030-4040-5050-6060-702327आवृत्ति40120402723hf 11 windoto
Answer» Answer: 23-32 27-37 40-50 120-130

1340.

(13)3 निम्न आँकड़ों की सहायता से समांतर माध्य ज्ञात कीजिए-वर्ग0-1010-2020-3030-4040-5050-6060-702327आवृत्ति40120402723hf 11 windoto

Answer»

Answer:

23-32

27-37

40-50

120-130

Discussion

1341.	Show how by changing the size of cation or anion, co-ordination number also changes?
Answer» Answer: INCREASE in COORDINATION number will increase the interionic separation and decrease the short ranged REPULSION. This, in turn, will allow the electrons present on the CENTRAL ION to expand thereby increasing the size of the central ion. Explanation: I hope it helps you

1341.

Show how by changing the size of cation or anion, co-ordination number also changes?

Answer»

Answer:

INCREASE in COORDINATION number will increase the interionic separation and decrease the short ranged REPULSION. This, in turn, will allow the electrons present on the CENTRAL ION to expand thereby increasing the size of the central ion.

Explanation:

I hope it helps you

Discussion

1342.	Formulation of liquid wax from the solid wax is a which change
Answer» ANSWER: PHYSICAL change Explanation: because they are INTER CONVERTIBLE

1342.

Formulation of liquid wax from the solid wax is a which change

Answer»

ANSWER:

PHYSICAL change

Explanation:

because they are INTER CONVERTIBLE

Discussion

1343.	The deficiency of vitamin A cause
Answer» Answer: NIGHT blindness this is 100 percent CORRECT. PLEASE mark me BRAINIEST

1343.

The deficiency of vitamin A cause

Answer»

Answer:

NIGHT blindness

this is 100 percent CORRECT.

PLEASE mark me BRAINIEST

Discussion

1344.	Mole Fraction formula?
Answer» ANSWER: will you be my frind let's START chatting Explanation: pxg-mbqy-oew

1344.

Mole Fraction formula?

Answer»

ANSWER:

will you be my frind

let's START chatting

Explanation:

pxg-mbqy-oew

Discussion

1345.	What will be the nature of Cuso4 solution and why? Comment on its pH.
Answer» Answer: Copper SULPHATE hydrolyse in water to give cupric hydroxide which is WEAK BASE and sulphuric acid which is strong acid. So hydrogen ion is more than hydroxyl ion in water.As a result the SOLUTION is acidic. The release of H+ ions by HYDROLYSIS makes the solution distinctly acidic.

1345.

What will be the nature of Cuso4 solution and why? Comment on its pH.

Answer»

Answer:

Copper SULPHATE hydrolyse in water to give cupric hydroxide which is WEAK BASE and sulphuric acid which is strong acid. So hydrogen ion is more than hydroxyl ion in water.As a result the SOLUTION is acidic. The release of H+ ions by HYDROLYSIS makes the solution distinctly acidic.

Discussion

1346.	Calculate volume of the followinga)1.5 mole of cl2 b)3.9 mole of sulphur dioxide c)5 mole of calcium oxide d)6.9 mole of NH3
Answer» ANSWER: U can CHOOSE nceart for SOLVING

1346.

Calculate volume of the followinga)1.5 mole of cl2 b)3.9 mole of sulphur dioxide c)5 mole of calcium oxide d)6.9 mole of NH3

Answer»

ANSWER:

U can CHOOSE nceart for SOLVING

Discussion

1347.	Graphite is relatively soft and conductor of electricity?
Answer» ANSWER: because it is a very REACTIVE METAL .

1347.

Graphite is relatively soft and conductor of electricity?

Answer»

ANSWER:

because it is a very REACTIVE METAL .

Discussion

1348.	Explain the transport of materials through xylem and phloem in plants.
Answer» ANSWER: Plants have tissues to transport water, nutrients and minerals. Xylem TRANSPORTS water and mineral salts from the roots up to other parts of the plant, while PHLOEM transports SUCROSE and amino ACIDS between the leaves and other parts of the plant. Explanation: mark me as brainlist please

1348.

Explain the transport of materials through xylem and phloem in plants.

Answer»

ANSWER:

Plants have tissues to transport water, nutrients and minerals. Xylem TRANSPORTS water and mineral salts from the roots up to other parts of the plant, while PHLOEM transports SUCROSE and amino ACIDS between the leaves and other parts of the plant.

Explanation:

mark me as brainlist please

Discussion

1349.	Vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate:(i) molar mass of the solute(ii) vapour pressure of water at 298 K.
Answer» Let, the molar mass of the solute by M g mol - 1 Now, the no. of moles of solvent (WATER),n1 = 90g / 18G mol-1 And, the no. of moles of solute,n2 = 30g / M mol-1= 30 / M mol P1 = 2.8 kPa Applying the relation: (p10 - p1) / p10 = n2 / (n1 + n2) ⇒ (p10 - 2.8) / p10 = (30/M) / {5 + (30/M)} ⇒ 1 - (2.8/p10) = (30/M) / {(5M+30)/M} ⇒ 1 - (2.8/p10) = 30 / (5M + 30) ⇒ 2.8/p10 = 1 - 30 / (5M + 30) ⇒ 2.8/p10 = (5M + 30 - 30) / (5M + 30) ⇒ 2.8/p10 = 5M / (5M+30) ⇒ p10 / 2.8 = (5M+30) / 5M ----------------(1) After the addition of 18 g of water: n1 = (90+18g) / 18 = 6 mol and the new vapor pressure is p1 = 2.9 kPa (Given) Again, applying the relation: (p10 - p1) / p10 = n2 / (n1 + n2) ⇒ (p10 - 2.9) / p10 = (30/M) / {6 + (30/M)} ⇒ 1 - (2.9/p10) = (30/M) / {(6M+30)/M} ⇒ 1 - (2.9/p10) = 30 / (6M + 30) ⇒ 2.9/p10 = 1 - 30 / (6M + 30) ⇒ 2.9/p10 = (6M + 30 - 30) / (6M + 30) ⇒ 2.9/p10 = 6M / (6M+30) ⇒ p10 / 2.9 = (6M+30) / 6M ----------------(2) Dividing equation (1) by (2),we GET: 2.9 / 2.8 = {(5M+30) / 5M} / {(6M+30) / 6M} ⇒ 2.9 x (6M+30 / 6) = (5M+30 / 5) x 2.8 ⇒ 2.9 x (6M +30) x 5 = (5M+30) x 2.8 x 6 ⇒ 87M + 435 = 84M + 504 ⇒ 3M = 69 ⇒ M = 23u Therefore, the molar mass of the solute is 23 g mol - 1. (ii) Putting the value of 'M' in equation (i), we get: ⇒ p10 / 2.8 = (5M+30) / 5M ⇒ p10 / 2.8 = (5x23+30) / 5x23 ⇒ p10 = (145 x 2.8) / 115 ⇒ p10 = 3.53 Hence, the vapor pressure of water at 298 K is 3.53 kPa.

1349.

Vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate:(i) molar mass of the solute(ii) vapour pressure of water at 298 K.

Answer»

Let, the molar mass of the solute by M g mol - 1

Now, the no. of moles of solvent (WATER),n1 = 90g / 18G mol-1

And, the no. of moles of solute,n2 = 30g / M mol-1= 30 / M mol

P1 = 2.8 kPa

Applying the relation:

(p10 - p1) / p10 = n2 / (n1 + n2)

⇒ (p10 - 2.8) / p10 = (30/M) / {5 + (30/M)}

⇒ 1 - (2.8/p10) = (30/M) / {(5M+30)/M}

⇒ 1 - (2.8/p10) = 30 / (5M + 30)

⇒ 2.8/p10 = 1 - 30 / (5M + 30)

⇒ 2.8/p10 = (5M + 30 - 30) / (5M + 30)

⇒ 2.8/p10 = 5M / (5M+30)

⇒ p10 / 2.8 = (5M+30) / 5M ----------------(1)

After the addition of 18 g of water:

n1 = (90+18g) / 18 = 6 mol

and the new vapor pressure is p1 = 2.9 kPa (Given)

Again, applying the relation:

(p10 - p1) / p10 = n2 / (n1 + n2)

⇒ (p10 - 2.9) / p10 = (30/M) / {6 + (30/M)}

⇒ 1 - (2.9/p10) = (30/M) / {(6M+30)/M}

⇒ 1 - (2.9/p10) = 30 / (6M + 30)

⇒ 2.9/p10 = 1 - 30 / (6M + 30)

⇒ 2.9/p10 = (6M + 30 - 30) / (6M + 30)

⇒ 2.9/p10 = 6M / (6M+30)

⇒ p10 / 2.9 = (6M+30) / 6M ----------------(2)

Dividing equation (1) by (2),we GET:

2.9 / 2.8 = {(5M+30) / 5M} / {(6M+30) / 6M}

⇒ 2.9 x (6M+30 / 6) = (5M+30 / 5) x 2.8

⇒ 2.9 x (6M +30) x 5 = (5M+30) x 2.8 x 6

⇒ 87M + 435 = 84M + 504

⇒ 3M = 69

⇒ M = 23u

Therefore, the molar mass of the solute is 23 g mol - 1.

(ii) Putting the value of 'M' in equation (i), we get:

⇒ p10 / 2.8 = (5M+30) / 5M

⇒ p10 / 2.8 = (5x23+30) / 5x23

⇒ p10 = (145 x 2.8) / 115

⇒ p10 = 3.53

Hence, the vapor pressure of water at 298 K is 3.53 kPa.

Discussion

1350.	(C6H5)2mn IUPAC NAME
Answer» Answer: mark as braiblest Explanation: Sunrise over the Himalayas After 31 days of continuous work at school, the summer holidays were finally announced. I forced my parents to PLAN a holiday to a hilly area — Munsiyari. Unknown to many, this place is STILL untouched by pollution. As we reached our destination we were caught in a hailstorm and we could do nothing that evening. However, in the morning I beheld a beautiful sight — the sun RISING between two Himalayan peaks. I felt a soft, COLD breeze. It was a remarkable experience. The full moon night was equally charming. We TOURED the region known as “Little Kashmir”.

1350.

(C6H5)2mn IUPAC NAME

Answer»

Answer:

mark as braiblest

Explanation:

Sunrise over the Himalayas

After 31 days of continuous work at school, the summer holidays were finally announced. I forced my parents to PLAN a holiday to a hilly area — Munsiyari. Unknown to many, this place is STILL untouched by pollution. As we reached our destination we were caught in a hailstorm and we could do nothing that evening. However, in the morning I beheld a beautiful sight — the sun RISING between two Himalayan peaks. I felt a soft, COLD breeze. It was a remarkable experience. The full moon night was equally charming. We TOURED the region known as “Little Kashmir”.

Discussion

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Vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate:(i) molar mass of the solute(ii) vapour pressure of water at 298 K.

Let, the molar mass of the solute by M g mol - 1

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And, the no. of moles of solute,n2 = 30g / M mol-1= 30 / M mol

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⇒ (p10 - 2.8) / p10 = (30/M) / {5 + (30/M)}

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(p10 - p1) / p10 = n2 / (n1 + n2)

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⇒ 1 - (2.9/p10) = 30 / (6M + 30)

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⇒ p10 / 2.9 = (6M+30) / 6M ----------------(2)

Dividing equation (1) by (2),we GET:

2.9 / 2.8 = {(5M+30) / 5M} / {(6M+30) / 6M}

⇒ 2.9 x (6M+30 / 6) = (5M+30 / 5) x 2.8

⇒ 2.9 x (6M +30) x 5 = (5M+30) x 2.8 x 6

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