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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.
| 7151. |
Which of the following is a polar covalent molecule? |
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Answer» Which of the following is a polar covalent molecule? |
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| 7152. |
what happens when an Iron strip is placed in zinc sulphate solution? |
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Answer» what happens when an Iron strip is placed in zinc sulphate solution? |
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| 7153. |
The electronic configuration of two elements A and B are given below: A 2, 6 B 2, 8, 1 (a) What type of chemical bond is formed between the two atoms of A? (b) What type of chemical bond will be formed between the atoms of A and B? |
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Answer» The electronic configuration of two elements A and B are given below: |
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| 7154. |
the heat of neutralization of LiOH and HCl at 25 degree celcius is 34.868KJ pet mol.The heat of ionisation of LiOH will be |
| Answer» the heat of neutralization of LiOH and HCl at 25 degree celcius is 34.868KJ pet mol.The heat of ionisation of LiOH will be | |
| 7155. |
Treatment of ammonia with excess ethyl chloride will yield. |
| Answer» Treatment of ammonia with excess ethyl chloride will yield. | |
| 7156. |
Find the height of a cuboid whose base area is 180 cm2 and volume is 900 cm3? |
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Answer» Find the height of a cuboid whose base area is 180 cm2 and volume is 900 cm3? |
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| 7157. |
When a metal X is treated with cold water, it gives a base Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z, which easily catches fire. Identify X, Y and Z and also write the reaction involved. |
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Answer» When a metal X is treated with cold water, it gives a base Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z, which easily catches fire. Identify X, Y and Z and also write the reaction involved. |
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| 7158. |
Differentiate between:(a) The crystalline and non-crystalline or amorphous forms of carbon.(b) Diamond and graphite. |
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Answer» Differentiate between: (a) The crystalline and non-crystalline or amorphous forms of carbon. (b) Diamond and graphite.
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| 7159. |
Complete the following equations:C2H5OH Conc. H2SO4−−−−−−−→ + H2O |
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Answer» Complete the following equations: |
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| 7160. |
An organic compound contains element C, H and oxygen. A 4.24 mg sample of compound is completely burnt in oxygen. It gives 8.45 mg of carbon dioxide and 3.46 mg of water. What is the mass percentage of each element? Determine the empirical and molecular formula of compound if molecular mass of compound is 88 u |
| Answer» An organic compound contains element C, H and oxygen. A 4.24 mg sample of compound is completely burnt in oxygen. It gives 8.45 mg of carbon dioxide and 3.46 mg of water. What is the mass percentage of each element? Determine the empirical and molecular formula of compound if molecular mass of compound is 88 u | |
| 7161. |
38.Which solution will have least vapour pressure 1) 0.1 molar Barium Chloride 1) 0.1 molar urea 3) 0.1 molar sodium sulphate 4) 0.1 molar sodium phosphate |
| Answer» 38.Which solution will have least vapour pressure 1) 0.1 molar Barium Chloride 1) 0.1 molar urea 3) 0.1 molar sodium sulphate 4) 0.1 molar sodium phosphate | |
| 7162. |
What is KETONE and ALDEHYDE?? |
| Answer» What is KETONE and ALDEHYDE?? | |
| 7163. |
41 PI3 , AsI3 , SbI3 (which one has smallest bond angle ) SOBr2 , SOCl2 , SOF2 (which one has maximum S--O bond ) |
| Answer» 41 PI3 , AsI3 , SbI3 (which one has smallest bond angle ) SOBr2 , SOCl2 , SOF2 (which one has maximum S--O bond ) | |
| 7164. |
The following is a sketch of an electrolytic cell used in the extraction of aluminium:Figure(a) What is the substance of which the electrodes A and B are made?(b) At which electrode (A or B) is the aluminium formed?(c) What are the two aluminium compounds in the electrolyte C?(d) Why is it necessary for electrode B to be continuously replaced? |
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Answer» The following is a sketch of an electrolytic cell used in the extraction of aluminium: Figure (a) What is the substance of which the electrodes A and B are made? (b) At which electrode (A or B) is the aluminium formed? (c) What are the two aluminium compounds in the electrolyte C? (d) Why is it necessary for electrode B to be continuously replaced? |
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| 7165. |
What is observed when neutral litmus solution is added to sodium hydrogen carbonate solution? |
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Answer» What is observed when neutral litmus solution is added to sodium hydrogen carbonate solution? |
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| 7166. |
How many sigma bonds are present in tetra - isobutyl methane |
| Answer» How many sigma bonds are present in tetra - isobutyl methane | |
| 7167. |
Why are unsaturated compounds are more reactive than saturated compounds |
| Answer» Why are unsaturated compounds are more reactive than saturated compounds | |
| 7168. |
most acidic in nature which one? MgO, BeO, CaO, BaO) |
| Answer» most acidic in nature which one? MgO, BeO, CaO, BaO) | |
| 7169. |
Which of the following non metals show/s an exceptional physical property/ies? |
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Answer» Which of the following non metals show/s an exceptional physical property/ies? |
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| 7170. |
[Pl(NH3)6]Cl4 complex gives |
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Answer» [Pl(NH3)6]Cl4 complex gives |
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| 7171. |
When a metal is put in water it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____ . |
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Answer» When a metal is put in water it starts floating and some gas is evolved from it without any fire. A burning candle is put off with a pop sound when a candle is exposed to this gas. The metal can be ____ . |
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| 7172. |
34. The crystalline salt Na2SO4.xH2O on heating losses 55.9%of it's mass and become anhydrous The formula of crystalline salt us |
| Answer» 34. The crystalline salt Na2SO4.xH2O on heating losses 55.9%of it's mass and become anhydrous The formula of crystalline salt us | |
| 7173. |
Electrovalent compounds are hard crystals but brittle. Give reasons. |
| Answer» Electrovalent compounds are hard crystals but brittle. Give reasons. | |
| 7174. |
In the Bridig's Arc method in preparation of lyophobic sols, shouldn't the +ve cations in vapour be attracted to the -ve surface of metal due to electrostatic attraction and neutralize them instantly? |
| Answer» In the Bridig's Arc method in preparation of lyophobic sols, shouldn't the +ve cations in vapour be attracted to the -ve surface of metal due to electrostatic attraction and neutralize them instantly? | |
| 7175. |
During the purification of Cu by electrolysis: |
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Answer» During the purification of Cu by electrolysis: |
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| 7176. |
1. SnO is acidic or amphoteric oxide |
| Answer» 1. SnO is acidic or amphoteric oxide | |
| 7177. |
(a) Define the following terms:(i) Acid(ii) pH scale(iii) Neutralisation.(b) (i) Outline the steps that would be necessary to convert insoluble lead (II) oxide into insoluble chloride.(ii) Write the balanced equations for the reaction required to convert insoluble lead (II) oxide into insoluble lead chloride.(iii) If iron reacts with dilute sulphuric acid, what will be the products?(iv) A solution of iron (III) chloride has a pH less than 7. Is the solution acidic or alkaline? |
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Answer» (a) Define the following terms: (i) Acid (ii) pH scale (iii) Neutralisation. (b) (i) Outline the steps that would be necessary to convert insoluble lead (II) oxide into insoluble chloride. (ii) Write the balanced equations for the reaction required to convert insoluble lead (II) oxide into insoluble lead chloride. (iii) If iron reacts with dilute sulphuric acid, what will be the products? (iv) A solution of iron (III) chloride has a pH less than 7. Is the solution acidic or alkaline? |
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| 7178. |
63.Whn a proton ,anti-proton annihilate,the energy released is |
| Answer» 63.Whn a proton ,anti-proton annihilate,the energy released is | |
| 7179. |
The number of moles present in 224 L of nitrogen at STP is |
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Answer» The number of moles present in 224 L of nitrogen at STP is |
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| 7180. |
5g sample of impure CaCO3 on heating produces 0.56L of CO2 at STP. If the percentage purity of sample is x*10, then the value of x is |
| Answer» 5g sample of impure CaCO3 on heating produces 0.56L of CO2 at STP. If the percentage purity of sample is x*10, then the value of x is | |
| 7181. |
Question 11 Fresh milk has a pH of 6. How do you think the pH will change as the milk turns into curd? Explain your answer. |
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Answer» Question 11 Fresh milk has a pH of 6. How do you think the pH will change as the milk turns into curd? Explain your answer. |
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| 7182. |
Write the names of any two isomers represented by the molecular formula C5H12. |
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Answer» Write the names of any two isomers represented by the molecular formula C5H12. |
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| 7183. |
A + B⇋C + DThe above reversible reaction is in equilibrium. What will be the effect on chemical equilibrium if the concentration of D is decreased in the system? |
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Answer» A + B⇋C + D The above reversible reaction is in equilibrium. What will be the effect on chemical equilibrium if the concentration of D is decreased in the system? |
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| 7184. |
The parts of motor cars are polished by chromium because the angle of contact between water and chromium is |
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Answer» The parts of motor cars are polished by chromium because the angle of contact between water and chromium is |
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| 7185. |
In electrolysis of water : (a) Name the gas collected at cathode and anode. (b) Why is volume of one gas collected at one electrode is double of another ? (c) Why are few drops of dil. H2 SO4 added to water ? |
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Answer» In electrolysis of water : (a) Name the gas collected at cathode and anode. (b) Why is volume of one gas collected at one electrode is double of another ? (c) Why are few drops of dil. H2 SO4 added to water ? |
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| 7186. |
State how the following conversions can be carried out:(a) Ethyl chloride to Ethyl alcohol.(b) Ethyl chloride to Ethene.(c) Ethene to Ethyl alcohol.(d) Ethyl alcohol to Ethane. |
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Answer» State how the following conversions can be carried out: (a) Ethyl chloride to Ethyl alcohol. (b) Ethyl chloride to Ethene. (c) Ethene to Ethyl alcohol. (d) Ethyl alcohol to Ethane. |
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| 7187. |
Translate the following statement into chemical equation and then balance it : Barium chloride solution reacts with aluminium sulphate solution to form a precipitate of barium sulphate and aluminium chloride solution. |
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Answer» Translate the following statement into chemical equation and then balance it : Barium chloride solution reacts with aluminium sulphate solution to form a precipitate of barium sulphate and aluminium chloride solution. |
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| 7188. |
Electrochemical equivalent of Cu in the reaction Cu2+(aq) + 2e- - - - - > Cu is |
| Answer» Electrochemical equivalent of Cu in the reaction Cu2+(aq) + 2e- - - - - > Cu is | |
| 7189. |
The hydroxide ion concentration of a solution is 1.0×10−9 M. What is the pH of this solution? |
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Answer» The hydroxide ion concentration of a solution is 1.0×10−9 M. What is the pH of this solution? |
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| 7190. |
210 on mixing one gram mole of helium of 300 k with 3g mole of 02 at 400k at a constant pressure. Find final Temperature? |
| Answer» 210 on mixing one gram mole of helium of 300 k with 3g mole of 02 at 400k at a constant pressure. Find final Temperature? | |
| 7191. |
What is the odour of chlorine? |
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Answer» What is the odour of chlorine? |
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| 7192. |
What is the state of CuSO4 and FeSO4 ? |
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Answer» What is the state of CuSO4 and FeSO4 ? |
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| 7193. |
In the equation N2 + aH2 → bNH3, what will be the value of a and b? |
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Answer» In the equation N2 + aH2 → bNH3, what will be the value of a and b? |
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| 7194. |
What is the hydrolysis constant of a salt made up of weak acid and weak base? |
| Answer» What is the hydrolysis constant of a salt made up of weak acid and weak base? | |
| 7195. |
72. What is the hybridization of viny carbocation and acytylenic carbocation? And which of them is more stable? |
| Answer» 72. What is the hybridization of viny carbocation and acytylenic carbocation? And which of them is more stable? | |
| 7196. |
(i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.(ii) Write a chemical equation to illustrate the acidic nature of nitric acid. |
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Answer» (i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate. (ii) Write a chemical equation to illustrate the acidic nature of nitric acid. |
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| 7197. |
Define displacement reaction with a suitable example. |
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Answer» Define displacement reaction with a suitable example. |
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| 7198. |
Sunita performs two sets of experiments to study the formation of lather(foam) by using liquid soap.Set 1 : She takes 10 ml of distilled water in test tube 'A', adds 5-6 drops of liquid soap in it and shakes the test tube vigorously.Set 2 : She takes 10 ml of distilled water in test tube 'B', adds 5-6 drops of liquid soap in it alongwith half spoonful of CaSO4, and shakes the test tube vigorously.(a) In which test tube, A or B, less lather is formed? Why?(b) In which test tube, A or B, more lather is formed? Why? |
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Answer» Sunita performs two sets of experiments to study the formation of lather(foam) by using liquid soap. Set 1 : She takes 10 ml of distilled water in test tube 'A', adds 5-6 drops of liquid soap in it and shakes the test tube vigorously. Set 2 : She takes 10 ml of distilled water in test tube 'B', adds 5-6 drops of liquid soap in it alongwith half spoonful of CaSO4, and shakes the test tube vigorously. (a) In which test tube, A or B, less lather is formed? Why? (b) In which test tube, A or B, more lather is formed? Why? |
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| 7199. |
State the octet rule with an example. |
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Answer» State the octet rule with an example. |
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| 7200. |
Write the chemical formulae of the following. (a) Hydrogen sulphide (b) Aluminium oxide (c) Sodium nitrate (d) Calcium hydroxide |
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Answer» Write the chemical formulae of the following. (a) Hydrogen sulphide (b) Aluminium oxide (c) Sodium nitrate (d) Calcium hydroxide |
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