InterviewSolution
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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.
| 1. |
An alkene combines with a conjusted diene to give an unconguated cycloalkadiene. The most likely title of this reaction is:A. Schotten-Baumann reactionB. Hoffmann-bromamide-reactionC. Diels-Alder reactionD. Pinacol-Pinacolone rearrangement. |
| Answer» Correct Answer - C | |
| 2. |
The product `C` is `CH_(3).CH_(2).C-=CH+HCl rarrBoverset(HI)rarrC`A. `CH_(3)CH_(2)-overset(I)overset(|)-CH-CH_(2)Cl`B. `CH_(3)CH_(2)-underset(Cl)underset(|)overset(I)overset(|)C-CH_(3)`C. `CH_(3)-underset(Cl)underset(|)(CH)-CH_(2)CH_(2)I`D. `CH_(3)CH_(2)CH_(2)-underset(Cl)underset(|)overset(I)overset(|)C-H` |
| Answer» Correct Answer - B | |
| 3. |
`CH-=CHunderset(H_(2)SO_(4))overset(HgSO_(4))rarrAunderset(H_(2)O)overset(CH_(3)MgBr)rarrBoverset(P//Br_(2))rarrC.` Here C is `:`A. `CH_(3)CH(Br)CH_(3)`B. `CH_(3)CH_(2)CH_(2)Br`C. `CH_(2)=CHBr`D. `BrHC=CH-CH_(3)` |
| Answer» Correct Answer - A | |
| 4. |
Identity the product (Y) in the following reaction sequence: A. CyclobutaneB. cyclopentaneC. pentaneD. cyclopentanone |
| Answer» Correct Answer - B | |
| 5. |
Which of the following cycloakanes has lowest heat of combustion per-`CH_(2)`- group per mole ?A. CyclopropaneB. CyclobutaneC. CyclopentaneD. Cyclohexane |
| Answer» Correct Answer - D | |
| 6. |
HBr reacts with `H_(2)C=CH-OCH_(3)` under anhydrous conditions at room temperature to give:A. `CH_(3)CHO` and `CH_(3)Br`B. `BrCH_(2)CHO` and `CH_(3)OH`C. `H_(3)C-CHBr-OCH_(3)`D. `H_(3)C-CHBr-OCH_(3)` |
| Answer» Correct Answer - D | |
| 7. |
Ethylene combines with sulphur monochloride to form.A. ethyl chlorideB. ethylene chlorideC. mustard gasD. ethylidene chloride |
| Answer» Correct Answer - C | |
| 8. |
a) A gaseous mixutre consists ethane and ehylene. How are the individual members recovered? A gaseous mixture consists of ethylene and acetylene. How both are separated from each other? |
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Answer» Pass mixture through conc. `H_(2)SO_(4)`. Ethylene is absorbed. The product on heating gives again `C_(2)H_(4)` b) Pass mixture through ammonial cuprous chlroide solution. The acetylene forms red precipitate. It is filtered and treated with `HNO_(3)` to recover accetylene. `Cu_(2)C_(2)` (red ppt) `+2HNO_(3) to C_(2)H_(2) + Cu_(2)(NO_(3))_(2)` |
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| 9. |
In the presence of platinum catalyst, hydrocarbon (A) adds hyrogen to form n-hexane. When hydrogen bromide is added to (A) instead of hydrogen, only a single bromo compound is formed. Which of the following is (A)?A. `H_(2)C=CH-CH_(2)-CH_(2)-CH_(2)`B. `CH_(3)-CH=CH-CH_(2)-CH_(2)-CH_(3)`C. `CH_(3)-CH_(2)-CH=CH-CH_(2)-CH_(3)`D. `CH_(3)-CH_(2)-CH_(2)-CH=CH-CH_(3)` |
| Answer» Correct Answer - C | |
| 10. |
`H_(2)C=CH_(2)+HOCl to ………….+ ……… to` ethylene chlorohydrin. Fill in the blanks in the above reaction with:A. `CH_(2)OH - CH_(2)^(-)`B. `CH_(2)Cl-CH_(2)+OH^(+)`C. `CH_(2)OH-CH_(2)^(+)+ (Cl)^(-)`D. `CH_(2)Cl-Cl^(+)+OH^(-)` |
| Answer» Correct Answer - D | |
| 11. |
When acetylen reacted with hydroxylic acid in presence of `HgCl_(20` the product obtained isA. methyl chlorideB. vinyl chlorideC. formaldehydeD. acetaldehyde |
| Answer» Correct Answer - B | |
| 12. |
When ethyl iodide is treated with alcoholic potash, we get:A. ethyl alcoholB. ethaneC. acetyleneD. ethylene |
| Answer» Correct Answer - D | |
| 13. |
Which one of the following alkenes will react faster with `H_(2)` under catalyst hydrogenation condtion?A. B. C. D. |
| Answer» Correct Answer - A | |
| 14. |
Benzene is a polymer of:A. methaneB. acetyleneC. ethaneD. ethylene |
| Answer» Correct Answer - B | |
| 15. |
Acetylene on ozonolysis gives:A. GlycolB. glyoxal and formic acidC. formaldehydeD. none of the above |
| Answer» Correct Answer - B | |
| 16. |
Which of the following used for conversion of 2-hexyne into trans-2-hexene?A. `H_(2)//Pd//BaSO_(4)`B. `H_(2),PtO_(2)`C. `NaBH_(4)`D. `Li-(NH_(3))/(C_(2)H_(5)OH)` |
| Answer» Correct Answer - D | |
| 17. |
A single compound of the structure. is obtained from ozonolysis of which of the following cyclic compounds?A. B. C. D. |
| Answer» Correct Answer - D | |
| 18. |
In the reaction given below, `X` is Neopentyl alcohol `overset(H_(2)SO_(4))(rarr)X`A. 2-methylpentaneB. NeopentaneC. 2-methylpent-2-eneD. 2-methylbut-2-ene |
| Answer» Correct Answer - D | |
| 19. |
Which of the following on reductive ozonolysis give only glyoxal?A. EthyleneB. BenzeneC. ToluneD. Acetylene |
| Answer» Correct Answer - B::D | |
| 20. |
Chloroform or iodoform on heating with silver powder gives:A. `CH_(4)`B. `C_(2)H_(4)`C. `C_(2)H_(6)`D. `C_(2)H_(2)` |
| Answer» Correct Answer - D | |
| 21. |
Ethyl alcohol is heated with conc. `H_(2)SO_(4)` at `170^(@)`C. The product formed is:A. `CH_(3)COOHCH_(3)`B. `C_(2)H_(6)`C. `C_(2)H_(4)`D. `C_(2)H_(2)` |
| Answer» Correct Answer - C | |
| 22. |
Ozonolysis product of cyclobutene is:A. GlycolB. dimethylglyoxalC. succinaldehydeD. methanal |
| Answer» Correct Answer - C | |
| 23. |
Which of the following alkenes will give an optically active alcohol when treated with `(H_(2)O)//H_(2)SO_(4)` ?A. 1-ButeneB. EtheneC. PropeneD. 2-Methylpropene |
| Answer» Correct Answer - A | |
| 24. |
Indicate the organic structure for the product expected when `2`-methylpropene is heated with acetyl chloride in the presence of anhydrous `ZnCl_(2)`.A. `(CH_(3))_(2)C(Cl)CH_(2)OC(CH_(3))`B. `(CH_(3))_(2)CHCH_(2)OCCH_(3)`C. `CH_(3)COCH(CH_(3))_(2)`D. none of the above |
| Answer» Correct Answer - A | |
| 25. |
When `1,1,2,2-`tetrabomopropane is heated with zinc powder in alcohol, which is formed `:`A. AlkyneB. AlkeneC. AlkaneD. None of the these |
| Answer» Correct Answer - A | |
| 26. |
Oxidation of 1-butene with hot `KMnO_(4)` solution produces:A. `CH_(3)CH_(2)COOH+HCOOH`B. `CH_(3)CH_(2)COOH+CO_(2)`C. `CH_(3)COOH+CO_(2)`D. `(CH_(3))_(2)C=O+CO_(2)` |
| Answer» Correct Answer - B | |
| 27. |
An optically active compound having molecular formula `C_(8)H_(16)` on ozonolysis gives acetonic as one of the products. The structure of the compound is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 28. |
Unknown compound (A) on oxidation with hot basic `KMnO_(4)` gives only one compound whose structure is given below, Compound (A) will be:A. `CH_(3)-C-=C-(CH_(2))_(4)-C-=C-CH_(3)`B. `CH_(3)-CH=CH-(CH_(2))_(4)-CH=CH_(2)`C. `CH_(3)-CH=CH-(CH_(2))_(4)-CH=CH-CH_(3)`D. |
| Answer» Correct Answer - D | |
| 29. |
Cycloalkane formed when 1,4-dibromopentane is heated with sodium is:A. methyl cyclobutaneB. cyclopentaneC. methyl cyclopentaneD. cyclobutane |
| Answer» Correct Answer - A | |
| 30. |
Which of the following reactions are expected to give `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH=CH_(2)` in yeilds of more than `50%` ?A. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-underset(OH)underset(|)(CH)-CH_(3)overset(H_(2)SO_(4))underset(Delta)to`B. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-underset(Br)underset(|)(CH)-CH_(3)overset((CH_(3))_(3)CO^(-)K^(+))underset(Delta)to`C. `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-underset(Br)underset(|)(CH)-CH_(3)overset(Zn)underset("Acetone")to`D. None of the above |
| Answer» Correct Answer - B::C | |
| 31. |
Addition polymerisation can be brought about by:A. free radicalsB. cationsC. anionsD. none of these |
| Answer» Correct Answer - A::B::C | |
| 32. |
Which of the following reagents will be able to distinguish between `1-`butyne and `2-`butyne ?A. `NaNH_(2)`B. HClC. `O_(2)`D. `Br_(2)` |
| Answer» Correct Answer - A | |
| 33. |
Structural formula for lewisite is:A. `underset(CHAsCl_(3))overset(CHCl)(||)`B. `underset(CHAsCI)overset(CHCl)(||)`C. `overset(CHCl)underset(CHAsCl_(2))(||)`D. `underset(CHAsCl_(2))overset(CH_(2))(||)` |
| Answer» Correct Answer - C | |
| 34. |
Match the following: |
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Answer» [A] (a-6), (b-8), (c-7), (d-1),(e-2),(f-3),(g-4),(h-5) [B] (a-5), (b-7), (c-8), (d-2), (e-1), (f-3), (g-4), (h-6). |
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| 35. |
Match the following: |
| Answer» Correct Answer - A::B::C::D | |
| 36. |
Match the following: |
| Answer» Correct Answer - A::B::C::D | |
| 37. |
Match the following: |
| Answer» Correct Answer - A::B::C::D | |
| 38. |
Match the following: |
| Answer» Correct Answer - A::B::C::D | |
| 39. |
Match the following: |
| Answer» Correct Answer - A::B::C::D | |
| 40. |
Oxidation of alkenes by cleavage with the acidic or alkaline `KmNO_(4)` of acidic `K_(2)Cr_(2)O_(7)` at higher temperature yields products depending upon the nature of alkene. A hot solultion of `KMnO_(4)` is a strong oxidising agent which gives only ketones and carboxylic acids and not aldehydes (as they cannot be isolated). Oxidation of alkenes with `OsO_(4)` followed by alcoholic `NaHSO_(3)` or `Na_(2)SO_(3)` yeilds glycols. Answer the following questions: Which of the following compounds on treatment with `OsO_(4)`, followed by `Na_(2)SO_(3)` will give cis-2-methyl butan-2,3-diol?A. 2-Methyl-2-buteneB. 4-Methyl-2-penteneC. 2,3-Dimethyl-2-buteneD. 2,2-Dimethyl-2-butene |
| Answer» Correct Answer - A | |
| 41. |
Oxidation of alkenes by cleavage with the acidic or alkaline `KmNO_(4)` of acidic `K_(2)Cr_(2)O_(7)` at higher temperature yields products depending upon the nature of alkene. A hot solultion of `KMnO_(4)` is a strong oxidising agent which gives only ketones and carboxylic acids and not aldehydes (as they cannot be isolated). Oxidation of alkenes with `OsO_(4)` followed by alcoholic `NaHSO_(3)` or `Na_(2)SO_(3)` yeilds glycols. Answer the following questions: Which of these compounds on oxidation with hot `KMnO_(4)` gives only butanoic acid?A. Oct-3-eneB. Oct-4-eneC. Oct-2-eneD. 3-Methylhep-3-ene |
| Answer» Correct Answer - B | |
| 42. |
The catalyst used in the Wacker process of oxidation of ethene to ethanol is:A. `PdCl_(2)`B. `V_(2)O_(5)`C. nickel complexesD. `TiCl_(4)` and `Al(CH_(3))(3)` |
| Answer» Correct Answer - A | |
| 43. |
Conjugated double bond is present in:A. propyleneB. isobutyleneC. butyleneD. butadiene |
| Answer» Correct Answer - D | |
| 44. |
One mole of alkene on ozonolysis gives 2 moles of butanone. The alkene is:A. 3,4-dimethyl hex-2-eneB. 2,3-dimethyl hex-3-eneC. 3,4-dimethyl hex-3-eneD. 2,3-dimethyl hex-2-ene |
| Answer» Correct Answer - C | |
| 45. |
Hydration of which one of the following yields a ketoneA. PropyneB. EtheneC. PropeneD. Ethyne |
| Answer» Correct Answer - A | |
| 46. |
Mustard gas is:A. `COCl_(2)`B. `C(Cl_(3))NO_(3)`C. `underset(Cl)underset(|)(CH_(2))-CH_(2)-S-CH_(2)-underset(Cl)underset(|)(CH_(2))`D. `CHCl_(2)NO_(2)` |
| Answer» Correct Answer - C | |
| 47. |
The reaction of with HBr gives:A. B. C. D. |
| Answer» Correct Answer - B | |
| 48. |
What will be the increasing order of the stability of the following alkenes? i) `H_(2)C=CH_(2)` ii) `CH_(3)CH=CH_(2)` iii) `CH_(3)CH_(2)CH=CH_(2)` iv) `(CH_(3))_(2)CHCH=CH_(2)` v) `(C)CH=CH_(2)`A. `I lt IV lt III lt II lt V`B. `V lt IV lt III lt II lt I`C. `V lt I lt IV lt III lt II`D. `IV lt III lt II lt V lt I` |
| Answer» Correct Answer - A | |
| 49. |
Acetylene is not used to prepare:A. WestronB. westrosolC. lewistiteD. mustard gas |
| Answer» Correct Answer - D | |
| 50. |
Acetylene when treated with `Cl_(2)` in `C(Cl_(4))` forms:A. mustard gasB. lewisiteC. westrosolD. westron |
| Answer» Correct Answer - D | |