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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1351. |
How many grams of oxygen will berequired to react completely with 27 gof Al? (Atomic mass : Al = 27,0 = 16)b. 16d. 32a. 8c. 24 |
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Answer» Answer: 32 Explanation: |
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| 1352. |
(iii)When a piece of wood is completelyburnt in air the mass of ashis (more,less)than wood. This isbecause mass ofthe (solid, gaseous)productsformed after the reaction are not taken. |
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| 1353. |
3Ina dark room+sunlight enteringfrom a window. Raju observed therandom / zigzag movement of dust particlesin air in that light path!" |
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Answer» f7çk Explanation: |
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| 1354. |
On monoxide.40. Which of the following acid is present in acid rain ?(a) Tartaric Acid(b) Acetic acid(c) Sulphuric Acid(d) Adipic Acid |
Answer» Sulphuric ACID............. |
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| 1355. |
Q:- Find the amount of Salt required to form 40% solution ( mass by mass % conc. ) in 450g of solvent.please answer the questionanswer the question I will mark it brainliest answer |
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Answer» Answer: Mas of common salt (solute)=40 g MASS of water (soluted) =320 g mass of solution=320+40 =360 g concentration of solution= massofsolution M mass
ofsolute
×100 360 40
×100=11.11% Hence, the concentration of the solution is 11.11% hope you like it plzz mark me as brainlest |
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| 1356. |
Q7:- Find the muss %. conc. of a solution prepared by adding 50g of Iodine in 500g ofalcohol ?please answer the questionanswer the question I will mark it brainliest answer |
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| 1357. |
D. Fill up the blanks with the correct choice given in brackets.1. Atoms have a centrally placed nucleus and an extra nuclear part in which the (electron/proton) revolves.2. Atomic number is represented by(A/Z) and mass number is represented by(A/Z).3. The first shell (or K shell) can have a maximum of(2/8) electrons, and thesecond shell (or L shell) can have a maximum of ...(8/18) electrons.4. Particles with positive charge are known as .. .....(anions/cations).5. 2,8,8,2 is the electronic configuration of(calcium/potassium) and has (20/40) protons present in its nucleus. |
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Answer» a b c d e Explanation: scyycuvvexuv vrvkkcev uctfob |
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| 1358. |
Choose the correct answer from the options given below.1. What can we infer from the symbolic representation of hydrogen. IH?a. Hydrogen has 1 electronc. Hydrogen has 0 neutrons.b. Hydrogen has 1 proton.d. All of these2. What is the total number of protons and neutrons present in an atom of an elementknown as?a. Atomic number b. Atomic shell c. Mass number d. Isotope3. What was observed about most of the a-particles during Rutherford's gold foil experiment?They passed undeflected through the foil. b. They were deflected by small angles.c. They were deflected by large angles. d. They rebounded their path completely.4. What is 1 amu equal to?a. Mass of 1 hydrogen atomb. 1/12th the mass of C-12 atomc. 1/12th the mass of O-16 atomd. 1/16th the mass of 0-16 atom5. Which is the valence shell of oxygen?a. K shellb. L shellC. M shelld. N shell |
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Answer» OH...GOD what a BIG QUESTION.. how can answer these |
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| 1359. |
Explain Brownian Motion with the Tyndall's effect.please answer the questionanswer the question I will mark the brainliest answer |
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Answer» Answer: Tyndall EFFECT. Brownian Motion. Meaning. The phenomenon of SCATTERING of LIGHT like a light BEAM that passes through a fluid (colloids) is known as the Tyndall effect. The RANDOM movement of particles in a fluid (colloids) is the Brownian motion, and it occurs due to the collisions of the particles |
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| 1360. |
Give one word or a phrase for the following statements.1. A bond formed by the transfer of electrons2. A bond formed by the sharing of electrons3. The dense, positively charged centre of an atom4. The outermost shell of an atom of an element5. The total number of protons present in an atom of an element |
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Answer» Answer: 1) ionic bond 2) covalent bond 4) valence shell |
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| 1361. |
Q5:- what is tincture of Iodine ?please answer the questionanswer the question I will mark the brainliest answer |
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Answer» Answer: Tincture of IODINE, iodine tincture, or weak iodine solution is an antiseptic. It is usually 2–7% ELEMENTAL iodine, ALONG with potassium iodide or sodium iodide, dissolved in a mixture of ethanol and water. Tincture SOLUTIONS are CHARACTERIZED by the presence of alcohol. Explanation: mark me as the brainliest pls... |
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| 1362. |
5. Nature of metal oxide is:b. Basic b) Acidicc) Neutral d) None of these 6. Non- metal, solution of which is used as an antiseptic onwounds.a. Potassium Dichromate b) Potassium permanganatec) Sodium chloride d) Copper Sulphate7. Name the following type of reaction :-Copper sulphate (CuSo4) + Zinc (Zn) = Zinc Sulphate (Znso4) + Cu (Copper)(Displacement / addition)8. Write any three differences between metals and non-metals on thebasis of following characters -Property Metal Non-Metal1) Appearance2) Conduction of heat3) Malleability4) Ductility 9. Write one word for the following:i) Materials having properties of both metalsand non-metals .ii) The property of metals due to which they produce sound .iii) The property of metals due to which they can be beaten into sheets .iv) Nature of metal oxides is .v) Thepropertyofmetalsby virtue ofwhichtheycanbedrawnintowires . 10. Answer the following questions: 1. What are the elements called which can neither fit with metals nor non-metals? ________________________________________________________________________________________ 2. Which of the following metals is the best conductor of heat and electricity? Gold, Silver, Copper, Aluminum 3. Which property of metals makes them useful as ringing bells? _______________________________________________________________________________________ 4. Arrange the following elements in order of increasing reactivity. Sodium, Magnesium, Copper, Zinc, AluminumPlz tell anyone i will mark brainliest and give 21 points. |
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Answer» Answer: Answer of 2nd QUESTION is copper Answer of 9TH question
Copper is used for making electric wires |
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| 1363. |
3.The main gases, that trap the solar heat radiations after their reflection fromthe earth, are- 1)methane, carbon monoxide, chlorofluorocarbon2) carbon dioxide, methane, water vapours3) carbon monoxide, nitrogen dioxide and chlorofluorocarbons, water vapours4) carbon monoxide, methane, nitrogen dioxide, water vapours.Which option is correct ..... plz tell. |
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Answer» Here is your answer : _ The main gases, that trap the solar heat radiations after their REFLECTION from the earth, are- 1)methane, CARBON monoxide, chlorofluorocarbon |
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| 1364. |
1) a) Name two factors which influence the state of matter.b) How is the atomic number and mass number related to the number of electrons and protons inside an atom |
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Answer» 1.pressure and TEMPERATURE 2. |
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| 1365. |
1. Classify the following substances into acidic and basic substances.Tomato juice, soap solution, toothpaste, lemon juice, vinegar? |
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Answer» acidic acidic basic acidic |
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| 1366. |
1) Electronic configuration of an atom ‘X’ is (2,8,8,1). It combines with another atom Yhaving electronic configuration (2,8,7): [3]i) What type of bond will be formed between X and Y?ii) Which atom is metal and which one is non-metal?iii) Write the formula of the compound formed. |
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Answer» Answer: i) IONIC bond ii) X is metal and Y non metal iii) XY |
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| 1367. |
Balancing of=iron III oxide + carbon monoxide = iron + carbon dioxide whoever will answer this correctly, will get a brilliant badge and thanks!!!! |
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Answer» SS gate of a CIRCULAR ROAD to the base to see if you are not filtered into the diameter a TV SHOW that can be used to be |
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| 1368. |
9:16Monday, 21 SeptembernownowWA BUSINESSMona7 NotificationsOm agoanaliaWA BUSINESSPrince Dingra Kawaaria4 NotificationsWA BUSINESSGurpriye Chandigarh Panchkulle Whole2 Notifications10mFACEBOOKNotificationMESSAGESAD-CSERNIKText MessageundeakSETTINGSSweden |
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| 1369. |
Give the skeletal equation for=Copper + sulphuric acid = copper II sulphate + water + sulphur dioxide |
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Answer» Hey mate!!! Here is ur answer. Explanation: CU + H2SO4 → CuSO4 + H2O + SO2 Hope It HELPS U |
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| 1370. |
Question:- During a chemical reaction Between two elements, a new product is formedA+B ----> AB^2Describe how A, B are different from AB^2 .please answer the question answer the question I will mark it brainliest answer |
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Answer» Answer: A and B ' s chemical COMPOSITION and chemical and PHYSICAL PROPERTIES are completely DIFFERENT from ABg Explanation: Because its a chemical change |
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| 1371. |
Balance =iron III chloride + water + sulphur dioxide = iron II chloride + sulphuric acid + hydrochloric acid |
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Answer» 2FeCl3 + 2H2O + SO2 → 2FeCl2 + H2SO4 + 2HCl I HOPE it will HELP you PLEASE MARK ME AS BRILLIANT and ALSO GIVE ME THANKS pleeeeease |
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| 1372. |
28. The Ganga Brahmaputra Plain of India is an overpopulated region because...a) Land is very fertileb) Flat land c) suitable for cultivation d) All the above |
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Answer» Ganga BRAHMAPUTRA PLAIN of India is an overpopulated region because land is FERTILE , FLAT. land , suitable for cultivation |
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| 1373. |
A sample was weighted using two different balances. Theresults were (i) 3.929 g (ii) 4.0 g. How would the weight ofthe sample be reported. If it has to be reported in 3significant no(a) 3.929 g(b) 3 g(c) 3.9 g(d) 3.93 g |
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Answer» d 3.93 is CORRECT answer |
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| 1374. |
Give the number of electron proton and neutron in 59CO27 AND 108AG47L |
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Answer» I didn't UNDERSTAND your QUESTION. |
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| 1375. |
SUBJECT - GEOGRAPHYACTIVITY TASK :- 1নিম্নলিখিত প্রশ্নগুলির উত্তর দাওঃ-১। RF 1:500000 -কে বিবৃতিমূলক স্কেলে পরিণত করাে।২। “সব শিল্ড অঞ্চলই মালভূমি, কিন্তু সব মালভূমি শিশু নয়”৩। জলবায়ুর সঙ্গে আবহবিকারের সম্পর্ক কি?৪। ম্যানগ্রোভ অরণ্যের দু'টি বৈশিষ্ট্য লেখ।ACTIVITY TASK :- 2 |
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| 1376. |
Name an allotropic form of carbon which is a good conductor of electricity. What is it used for? please answer it properly.And please if you know what is actually allotropic please explain me that also. It is not too much important well.Warning: do not spam or else your will be reported............ |
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Answer» Answer: there are two allotropic FORM of carbon that is diamond and GRAPHITE In. this graphite is a CONDUCTOR of electricity because of its hybridization |
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| 1377. |
Today's factDo you knowFact:- The icecream we see in Ads are actually mashed potatoes because they will not melt during production Explanation :- Did you know that scoops of mashed potatoes are dyed in different colours and use in icecream ads because they don't melt during long shoots under hot studio lights ? Shaving cream is used instead of whipped cream because it has a consistent thickness and doesn't melt Follow for more |
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Answer» my GOD |
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| 1378. |
A) who introduced atomic number? Define atomic numberb) What are isotopes? Give an example,c) States the postulates of kinetic molecular theory.d) Compare the three states of matter with respect to:i) Compressibility) 2)intermolecular spaces. |
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Answer» Explanation: itna TIME nhi h humare PASS etne answer DE....thoda chota question pucha KRO |
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| 1379. |
BALANCE THE FOLLOWING EQUATIONS:1)P2O5 +H2O→H3PO42)Al+H2SO4→Al2(SO4)3+H23)Fe2O3+CO→Fe+CO24)CO+O2→CO2 |
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Answer» Answer: 1) P205 + 3H2O:- 2H3Po4 2) 2AL+ 3H2So4 :- AL2(so4)3+3H2 Fe2O3+3Co:-2Fe+3Co2 2Co + O2 :- 2Co2 |
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| 1380. |
EXERCISE 1Ce number of persons who visited the holy shrine ofnsecutive years was 13789509 and 12976498 respece shrine during these two years? +st year, three sugar factories in a town produced 24864568 bags of sugar respectively. How many bagsduring last year? + |
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Answer» dj dj dj F FB fb fb fb th in here dj ka or if kuchh BHI nahi ho raha |
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| 1381. |
When a particles are sent through a thin metal foil, most of them go straight through thefoil because:A) a particles are much heavier than electrons.B) a-particles are positively charged.C) Most part of the atom is empty.D) a particles move with high speed |
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Answer» Due to high MOMENTUM and empty space in ATOM most of a-particles go straight through the foil SO ( A ) AND ( C ) ARE CORRECT HOPE IT HELPED U... PLEASE MARK THIS AS BRAINLIEST
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| 1382. |
A non-renewable source of energy fuel used instead of fossel fuel to reduce greenhouse gas pollution is. |
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Answer» PRODUCT of petroleum Explanation: |
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| 1383. |
Q13a) What is the chemical name of blue vitriol ? b) How are crystals of copper sulphate prepared?Q14a) Shearing is done insummer season not in winters. Why is shearing done in summers ? What value does this act show ?b) What are the main hazards of wool industry? c) Write a note on rearing. Q15a) Paheli is suffering from acidity. Is it advisable to give her orange juice in this situation? Why? |
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Answer» 13). a). Copper(II) sulfate b). Crystallization is the process by which we can OBTAIN crystals of copper sulphate. 14). a). Wool is an insulating material that protects the animal from cold environment. Shearing is usually done in summer because sheep do not require insulating material in summer and it helps the animal to sustain easily in summer as well. b). The most common health and safety hazards identified in the wool shed that can affect you are: sprains and strains, wrist and back problems, cuts and BRUISING, fatigue and dehydration. Some more serious health hazards are: wool based infections, giardia, leptospirosis, hepatitis, tetanus, DERMATITIS and noise. c). Rearing of sheep means to look after the sheep by providing them food, shelter and health care. breeding is done to obtain animals with desired characters . the two individuals of desirable character can be selected as parents. 15). a). Paheli is suffering from indigestion due to acidity. ... Orange juice is ACIDIC in nature and indigestion is caused by excess acid in the stomach. So having orange will make the problem WORSE then relieving it. Instead, she should be given basic substances like Milk of Magnesia for treatment. Hope it helps u mark as brainliest and don't forget to follow me !!!! |
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| 1384. |
Q11) Animal activists are against silk production. Why?Q12 a) Why do curd, lemon juice and tamarind taste sour? b) Name the bases present in i)window cleaner ii) soapsc) Assertion(A): Tearing of paper into small pieces is a chemical 1change. Reason(R): It is not possible to rejoin small pieces ofpaper to get back the original paper sheet.i) Both A and R are true and R is the correct explanation ofAii)Both A and R are true but is not the correct explanationof A iii) A is true but R is false iv) A is false but R is true. |
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Answer» 11. During silk PRODUCTION, cocoons are thrown in boiling water. As a result, the silk worms DIE. So, animal activists are against it. 12. a). Curd, lemon juice and tamarind all contain acid. So they are acidic and acids are sour in taste. b). i). ammonium hydroxide (NH4OH) ii). sodium hydroxide (NaOH) or potassium hydroxide (KOH) C). iv). A if false but R is true |
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| 1385. |
The total mass of substances undergoing physical or chemical change will be the(equal to/ more than)total mass of the substance after the change.Fill in the correct answer |
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Answer» EQUAL to |
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| 1386. |
Music and dance party was arranged on the occasion of the marriage of Amit elder brother. Amit had invited Sanjiv for themusic and dance party was arranged on the occasion of the marriage of Amit elder brother. Amit had invited Sanjiv for the occasion. both were enjoying the program. suddenly there were clouds like fume on the stage. Sanjiv asked, Amit what is this magical substance? Amit said I don't know let me a somebody.a )what were the clouds like fume due tob) how are the fumes obtainedc) name the process involved define itpls answer this question I will mark you brainliest..don't spam or else I'll report your answer if you did |
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Answer» Explanation: music and dance party was arranged on the occasion of the marriage of Amit ELDER brother. Amit had invited SANJIV for themusic and dance party was arranged on the occasion of the marriage of Amit elder brother. Amit had invited Sanjiv for the occasion. both were ENJOYING the program. suddenly there were clouds like fume on the stage. Sanjiv asked, Amit what is this magical substance? Amit said I don't KNOW let me a SOMEBODY. |
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| 1387. |
4.The amount of heat produced, on complete burning of 10 kg of a given fuelin pure oxygen, equals H kilojoule. The calorific fuel, of that fuel, would equa(10 H) kJ/kg(0.1 H) kJ/kg(H+10) kJ/kg(H-10) kJ/kgplease explain with answer. |
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Answer» Answer: We KNOW Mass of fuel× calorific value=mass of water ×specific heat ×temperature difference Given mass of fuel m
=10 kg and mass of water m
= 2kg ΔT=70 −20 0 =50 0 C Specific heat of water =4.186J/grams 0 C=4.186×10 −3 J/kg 0 C Now putting the above values in the equation we GET C V
= 10 2×4.186×10 −3 ×(70−20)
=4.186×10 −2 J/kg |
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| 1388. |
8)A student tries to burn a piece of wood with a matchstick. He notices that everytime he brings the matchstick closer to coal, the coal turns red, but it does notcatch fire. Why does this happen?normal conditions. |
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Answer» Answer: Explanation: he must BRING matchstick in the place where the PRESSURE of air is low |
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| 1389. |
12)Assertion (A): Forests, wildlife, minerals are examples of Inexhaustibleresources.Reason (R): The resources that are present in unlimited quantities in nature andare not likely to be exhausted by human activities are called Inexhaustibleresources.A) A is correct and R is the correct explanation of A.B) A is correct and R is not the correct explanation of A.C) A is correct and Ris wrong.D) A is wrong and R is correct |
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Answer» Answer: D is the answer Explanation: FORESTS WILDLIFE and minerals r not unlimited but R is a TRUE statement |
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| 1390. |
12.Some definitions are given below which can be corrected bychanging one word. Correct them.(a)Aquifer is ground water stored between layers of hardrock above the water table.(b) The process of evaporation of water in the ground is calledinfiltration.(c) The evaporation of water from oceans and its arrivalback into oceans is called vapour cycle. |
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Answer» a) AQUIFER is GROUNDWATER STORED between layers of hard the rock below the water table. b) The process of CONDENSATION of water in the ground is called infiltration. c) The evaporation of water from oceans and its arrival back into oceans is called water cycle. |
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| 1391. |
15. Which of the following represents the correct relation between Avogadro's number (N.), nuparticles (N) and moles (n)?(a) n = N/N (b) n N/N (c)nNN(d) all are correct |
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Answer» Answer: (B) is the BEST answer of your question. please MARK my answer as brainliest. |
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| 1392. |
(1) how do you determine the valency of an element ? (2) Explain the term variable valency with the help of an element .who can give currect ans l will mark BRAINLIST and thanks 20+ |
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Answer» Answer: 1. If the number of electrons in the outer shell is between one to four, the compound is SAID to have positive valency. For compounds with electrons four, five, six, or seven, the valency is determined by subtracting the electron from eight. 2.Certain elements combine with other atoms, DONATING, accepting or sharing electrons in DIFFERENT proportions depending on the nature of the REACTION. For EXAMPLE, iron combines with oxygen to form ferrous oxide as well as ferric oxide. This is termed variable valency. |
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| 1393. |
10. A change in the physical state can be brought about(a) only when energy is given to the system(b) only when energy is taken out from the system(c) When energy is either given to, or taken out from the system(d) Without any energy change |
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| 1394. |
Define the following :i) Radioactive elementsii) Atom |
Answer» THIS IS THE ANS.MATE ....... OKKKKK |
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| 1395. |
9. Molecular mass is defined as the:(a) Mass of one molecule of any substance compared with the mass of one atom of C-12(b) Mass of one atom compared with the mass of one atom of hydrogen(c) Mass of one atom compared with the mass of one molecule(d) None of the above |
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Answer» |
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| 1396. |
8. 3.42 g of sucrose are dissolved in 18 g of water in a beaker. The numbers of oxygen atoms in thesolution are:(a) 6.68 1023(b) 6.09 x1022(c) 6.022 1023(d) 6.022 x1021 |
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Answer» Answer: The NUMBER of oxygen atoms in the SOLUTION are. or 342g = 1 mole of SUCROSE. 3.42 G = 0.01 mole of sucrose. ∴ 0.01 mole of sucrose will contain O-atoms. |
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| 1397. |
Explain the process of salt formation through a flow chart. Identify the changes that happen duringthis process and classify them as physical and chemical changes. |
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| 1398. |
Answer the questions pertaining to the chemical equation given below.Curs) + 2H2SO4 Q - CuSO4(s) + SO2(g) + 2H20)(i)State what the term (g) stands for.(ii) Is the above equation balanced? Justify your answer in one sentence.(iii) How many molecule/s of copper sulphate have been formed? |
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Answer» Answer: (i) The term (g) shows that the SUBSTANCE produced as a result of the reaction is a gas. (II) Yes, the above equation is balanced as the NUMBER of ATOMS on the reactant side is equal to the number of atoms on the PRODUCT side. (iii) One molecule of copper sulphate is formed. Hope it helps!! |
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| 1399. |
Define the following terms.i) Matterii) Element. |
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Answer» matter : Matter, material substance that constitutes the observable universe and, together with energy, forms the BASIS of all objective phenomena. element : an element is a PURE substance which cannot be broken down by chemical means I HOPE you like it |
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| 1400. |
Name the non-metallic element which conducts electricity. |
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Answer» Graphite Explanation: Graphite is a non-metal and it is the only non-metal that can conduct ELECTRICITY. You can find non-metals on the right side of the periodic table and graphite is the only non-metal that is a good CONDUCTOR of electricity. |
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