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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. |
Why do haloalkanes dissolve in organic solvents? |
| Answer» Haloalkenes are covalent compounds with little polarity. They dissolve in organic solvent which are of similar nature. | |
| 2. |
Benzene diazonium chloride is reacted with KI givesA. iodobenzeneB. chlorobenzeneC. benzene diazonium chlorideD. m-iodo benzene diazonium chloride |
| Answer» Correct Answer - A | |
| 3. |
The product formed on reation of ethyl alcohol with bleaching powder is .A. chloroformB. ethyl chlorideC. acetaldehydeD. chloral |
| Answer» Correct Answer - A | |
| 4. |
Ethyl alcohol on treatment with bleaching powder gives chloroform .Which of the following is`//`are the function of bleaching powder ?A. as an oxidising agentB. as a chlorinating agentC. as a hydrolysing agentD. as chlorinating oxidising and hydrolysing agent |
| Answer» Correct Answer - D | |
| 5. |
(A) `CH_(3)CH_(2)Br+AgCN to underset(("major"))(CH+(3)CH_(2)NC)+underset(("minor"))(CH_(3)CH_(2)CN)` (R) `.^(-)CN` is an ambident nucleophilic therefore reaction gives both cyanide and isocyanide.A. If both (A) and (R) are correct and (R) is the correct explanation of (A)B. If both (A) and (R) are correct but (R) is not the correct explanation of (A)C. If (A) is correct but (R) is incorrect.D. If (A) is incorrect but (R) is correct. |
| Answer» Correct Answer - A | |
| 6. |
When a solution of sodium chloride containing ethyl alcohol is electrolysed, it forms:A. ethyl chlorideB. chloralC. chloroformD. acetaldehyde |
| Answer» Correct Answer - C | |
| 7. |
When ethyl chloride is heated with AgCN, the main product is :A. ethyl cyanideB. ethyl isocyanideC. ethyl amineD. ethyl nitrate |
| Answer» Correct Answer - B | |
| 8. |
Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent. Reason: Oxidising agent oxidises `I_(2)` into HI.A. Assertion and reason both are correct and reason is correct explanation of assertionB. Assertion and reason both are wrong statementsC. Assertion is correct but reason is wrong statementD. Assertion is wrong but reason is correct statement. |
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Answer» Correct Answer - C Assertion is correct but reason is wrong statement. Correct Reason Oxidising agent oxidises HI into `I_(2)` to prevent the possibility of backward reaction |
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| 9. |
Assertion: In monohaloarenes, further electrophilic substitution occurs at ortho and para position Reason: Halogen atom is a ring deactivatorA. Assertion and reason both are correct and reason is correct explanation of assertionB. Assertion and reason both are wrong statementsC. Assertion is correct but reason is wrong statementD. Assertion and reason both are correct statements but reason is not correct explanation of assertion |
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Answer» Correct Answer - D Assertion and reason both are correct statements but reason is not the correct explanation of assertion. Correct explanation in monohaloarenes, halogen atom increases the electron density at ortho and para position. So, further electrophilic substitution occurs at ortho and para positions |
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| 10. |
Assertion: In monohaloarenes, further electrophilic substitution occurs at ortho and para position Reason: Halogen atom is a ring deactivatorA. Assertion and reason both are correct and reason is correct explanaion of assertion.B. Assertion and reason both are wrong statements.C. Assertion is correct but reason is wrong statement.D. Assertion and reason both are correct statements but reason is not correct explanation for assertion. |
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Answer» Correct Answer - D Correct explanation: Halogen atoms are ortho and para directing as well well as ring deactivators. |
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| 11. |
Which of the following compounds will give a yellow precipitate with `I_(2)` and alkali?A. AcetophenoneB. BenzophenoneC. Methyl acetateD. Propionaldehyde |
| Answer» Correct Answer - A | |
| 12. |
Which of the following will give a yellow precipitate with `I_(2)//NaOH`A. `ICH_(2)COCH_(2)CH_(3)`B. `CH_(3)COOCOCH_(3)`C. `CH_(3)CONH_(2)`D. `CH_(3)CH(OH)CH_(2)CH_(3)` |
| Answer» Correct Answer - A::D | |
| 13. |
Allyl chloride on dehydrochlorination gives:A. PropadieneB. propyleneC. allyl alcoholD. acetone |
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Answer» Correct Answer - A `underset("ally chloride")(CH_(2)=CHCH_(2)Cl)overset("Dehydro-halogenation")tounderset("propadiene")(CH_(2)=C=CH_(2)+)HCl` |
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| 14. |
Which of the following compound will given yellow precipitate on shaking with aqueous solution of NaOH followed by the addition of `AgNO_(3)` solution ?A. B. C. D. |
| Answer» Correct Answer - 3 | |
| 15. |
The reaction `CH_(3)CH=CH_(2)+HBr overset (M.R) to` mainly givesA. 2-bromopropaneB. 2,2-dibromoproaneC. 1-bromopropaneD. 1,2-dibromopropane |
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Answer» Correct Answer - A The hydrogen atom of HBr is attched to the carbon atom of double bond that already has more hydrogens. The M. Rule is based on stability of carbonium ion `CH_(3)CH= CH_(2)+HBr overset(M.R) to underset("2-bromopropane")(CH_(3)CHBr CH_(3))` |
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| 16. |
Reaction of alkanes with halogen is explosive in case ofA. `Cl_(2)`B. `Br_(2)`C. `I_(2)`D. `F_(2)` |
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Answer» Correct Answer - D Fluorine has exceptionally low bond energy, so it reacts violently with alkanes. |
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| 17. |
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. A isA. `CH_(4)`B. `CH_(2)=CH_(2)`C. `CH-=CH`D. `C_(2)H_(6)` |
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Answer» Correct Answer - A `CH_(4)Br_(2) overset(AlBr_(3)) to CH_(3) Br+ HBr` `2CH_(3)Br+2Na overset("dry ether") to C_(3)H_(6)+2NaBr` Ehtane is the hydrocarbon which contain less than four carbon atoms. |
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| 18. |
Assertion (A) Nitration of chlorobenzene leads to the formation of m-nitrochlorobenzene. Reason (R) `-NO_(2)` group is a m-directing group.A. Assertion and reason both are correct and reason is correct explanation of assertionB. Assertion and reason both are wrong statementsC. Assertion is correct but reason is wrong statementD. Assertion is wrong but reason is correct statement. |
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Answer» Correct Answer - D Assertion is wrong but reason is correct statement. Correct Assertion Chlorination of nitrobenzene leads to the formation of m-nitrochiorobenzene because `-NO_(2)` group deactivates the ring because it is meta directing. |
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| 19. |
`CH_(3)CH_(2)Brunderset(alc.)overset(NaCN)toCH_(3)CN` true, hence `(CH_(3))_(3)CBrunderset(alc.)overset(NaCN)toA`. Hence A is,A. `(CH_(3))_(3)C-CN`B. `(CH_(3))_(3)C-CN`C. `CH_(3)-CH=CH-CH_(3)`D. `CH_(3)-CH_(2)-CH=CH_(2)` |
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Answer» Correct Answer - B CN is stronger nucliophile causesloss of HBr instead of nucleophilic substitution reaction. |
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| 20. |
which is the most stable carbocation formed as intermediate in nucleophilic substitution reaction ?A. `CH_(3)=overset(+)(CH)`B. C. `(CH_(3))_(3)overset(+)(C)`D. |
| Answer» Correct Answer - B | |
| 21. |
During dehydrohalogenation of 2-iodopropane which of the following carbocation is likely to be formed as an intermediateA. `CH_(3)CH_(2)CH_(2)^(+)`B. `CH_(2)CH^(+)CH_(3)`C. `CH_(3)CH_(2)^(+)`D. `CH_(3)^(+)` |
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Answer» Correct Answer - B 2-iodopropane is `CH_(3)CHlCH_(3)` is secondary alkyl halide produced `CH_(3)CH^(+)CH_(3)` carbocation on heterolysis. |
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| 22. |
In nucleophilic substitution reaction aryl chloride resemblesA. ethyl chlorideB. benzyl chlorideC. allyl chlorideD. vinyl chloride |
| Answer» Correct Answer - D | |
| 23. |
The reaction , `R-Br+NaCN to R-CN +NaBr` is an example of ,A. elimination reactionB. nucleophilic substitutionC. electrophilic substitutionD. oxidation reduction |
| Answer» Correct Answer - B | |
| 24. |
For the following reaction : `(A) CH_(3)CH_(2)CH_(2)Br+KOH to CH_(3)CH=CH_(2) `=KBr +H_(2)O` which of the following statement is correct ?A. (A) is elimination (B) and (C) are substitution reactionB. (A) is substitution (B) and (C) are addition reactionC. (A) and (B) are elimination reaction and (C) is addition reactionD. (A) is elimination (B) is substitution and (C) is addition reaction |
| Answer» Correct Answer - D | |
| 25. |
Transition state is accompanied by the formation of which of the fowllowing species in `SN^(1)` reactionA. carbocationB. free radicalsC. carbanionD. a dianion |
| Answer» Correct Answer - A | |
| 26. |
Which is most stable carbocation formed as intermediate in nucleophilic substitution reactionA. `CH_(2)=CH^(+)`B. `(CH_(3))_(3)C^(+)`C. D. |
| Answer» Correct Answer - B | |
| 27. |
Some reaction are given below 1) `C_(2)H_(5)Br+C_(2)H_(5)ONato(C_(2)H_(5))_(2)+O+NaBr` 2) `C_(2)H_(5)Br^(+)KCNtoC_(2)H_(5)CN+KBr` 3) `CH_(4)+Br_(2)overset(AlBr_(3))toCH_(3)Br+HBr` 4) `C_(2)H_(5)Br+KOHoverset(alc.)toCH_(2)+KBr+H_(2)O` Among the above reactions, depict teh nucleophilic substitution reactions is/areA. only 3B. only 3 and 4C. only 1, 2D. only 4 |
| Answer» Correct Answer - C | |
| 28. |
Out of two bromoderivatives `C_(6)H_(5)CH(CH_(3))Br and C_(6)H_(5)CH(C_(6)H_(5))Br`, which one is more reactive in `S_(N^(1))` reaction and why? |
| Answer» `C_(6)H_(5)CH(C_(6)H_(5))Br` is more reactive. | |
| 29. |
Predict the order of reactivity of the compounds in `S_(N)1` and `S_(N) 2` reactions . `C_(6)H_(5)CH_(2) Br, C_(6)H_(5) CH (C_(6)H_(5)) Br , C_(6) H_(5) CH(CH_(3)) Br , C_(6)H_(5) C (CH_(3)) (C_(6)H_(5)) Br` |
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Answer» `C_(6)H_(5) C(CH_(3))(C_(6)H_(5)) Br gt C_(6)H_(5) CH(C_(6) H_(5))Br gt C_(6)H_(5) CH (CH_(3))Br gt C_(6)H_(5) CH_(2) Br (S_N 1)` `C_(6)H_(5) C(CH_(3)) (C_(6)H_(5)) Br lt C_(6)H_(5) CH (C_(6)H_(5)) Br lt C_(6) H_(5) CH (CH_(3)) Br lt C_(6) H_5 CH_(2) Br (S_N 2)` Of two secondary bromides , the carbocation intermediate obtained from `C_(6)H_(5) CH(C_(6) H_(5)) Br` is more stable than obtained from `C_(6)H_(5) CH(CH_(3)) ` Br because it is stabilised by two phenyl groups due to resonance . Therefore , the former bromide is more reactive than the latter in `S_(N)1` reactions . A phenyl. group is bulkier than a methyl group . Therefore `C_(6)H_(5) CH (C_(6) H_(5)) Br` is less reactive than `C_(6)H_(5) CH(CH_(3))` Br in `S_(N) 2`reactions . |
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| 30. |
Major product of the following `S_(N)1` reaction is `CH_(3)underset(Br)underset(|)CHunderset(CH_(3))underset(|)(CH)CH_(3)+C_(2)H_(5)ONato`A. `{:(CH_(3)CHCHCH_(3)),(" "|),(" "OC_(2)H_(5)):}`B. `{:(CH_(3)CHCHCH_(2)CH_(2)OC_(2)H_(5)),(" "|),(" "CH_(5)):}`C. `CH_(3)CH_(2)underset(OC_(2)H_(5))underset(|" ")overset(CH_(3))overset(|" ")(C CH_(3))`D. none is correct |
| Answer» Correct Answer - C | |
| 31. |
The major product obtained on treatment of following compounds with `CH_(3)O^(-)` is A. B. C. D. |
| Answer» Correct Answer - A | |
| 32. |
The major product obtained in the following reaction is A. `(+-)C_(6)H_(5)CH(Ot-Bu)CH_(2)C_(6)H_(5)`B. `C_(6)H_(5)CH=CHC_(6)H_(5)`C. `(+)C_(6)H_(5)CH(Ot-Bu)CH_(2)C_(6)H_(5)`D. `(-)C_(6)H_(5)CH(Ot-Bu)CH_(2)C_(6)H_(5)` |
| Answer» Correct Answer - B | |
| 33. |
Which of the following , upon treatment with tert-BuONa followed by addition of bromine water , fails to decolourise the colour of bromine ?A. B. C. D. |
| Answer» Correct Answer - A | |
| 34. |
Arrange the following compounds in order of their reactivity towards `S_(N^2)` reaction. (i) `CH_3(CH_2)_3CH_2Br` (ii) `(CH_3)_2CHCH_2CH_2Br` (iii) `CH_3CH_2-overset(CH_3)overset(|)(CH)-CH_2Br` (iv) `CH_3-underset(CH_3)underset(|)overset(CH_3)overset(|)C-CH_2Br`A. (i)gt(ii)gt(iii)gt(iv)B. (ii)gt(iii)gt(iv)gt(i)C. (iii)gt(i)gt(ii)gt(iv)D. (iv)gt(ii)gt(i)gt(iii) |
| Answer» Correct Answer - A | |
| 35. |
`CH_(3) overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C) -Br overset(" KOH (alcoholic) ")underset(Delta)(to) (A) overset(HBr//R_(2)O_(2))(to) underset(("major"))((B))` (B) isA. `CH_(3) -overset(CH_(3))overset(|)underset(H)underset(|)(C )-CH_(2) -Br`B. `CH_(3)-overset(CH_(3))overset(|)underset(Br)underset(|)(C ) -CH_(3)`C. CH_(3) -overset(CH_(3))overset(|)underset(CH_(2))underset(|)(C) -OH`D. `CH_(3)-overset(CH_(2) -H)overset(|)underset(CH_(3))underset(|)(C) - Br` |
| Answer» Correct Answer - 1 | |
| 36. |
`CH_(3)CH_(2)underset(Br)underset(|)(CH)CH_(2)CH=CH_(2) overset("alcoholic KOH")rarr A` (predominant) A isA. `CH_(3)CH_(2)CH=CHCH=CH_(2)`B. `CH_(3)CH_(2)=CHCH_(2)CH=CH_(2)`C. `CH_(2)=CHCH_(2)CH_(2)CH=CH_(2)`D. `CH_(2)CH_(2)CH_(2)CH_(2)C-=CH` |
| Answer» Correct Answer - A | |
| 37. |
Identify the products X and Y formed in the following reaction. `CH_3-CH_2-CH=CHCH-CH_3+HCltoX+Y`A. `X=CH_3CH_2CH_2CH_2CH_2Cl`, `Y=CH_3CH_2-underset(Cl)underset(|)(CH)-CH_2CH_3`B. `X=CH_3CH_2-underset(Cl)underset(|)(CH)-CH_2CH_3, Y=CH_3CH_2CH_2-underset(Cl)underset(|)(CH)-CH_3`C. `X=CH_3CH_2-underset(Cl)underset(|)(CH)-CH_2CH_3, Y=CH_3-underset(Cl)underset(|)(CH)-underset(Cl)underset(|)(CH)-CH_2CH_3`D. `X=ClCH_2-CH_2-CH=CH-CH_3, Y=CH_3CH_2-CH=CH-CH_2Cl` |
| Answer» Correct Answer - B | |
| 38. |
Which of the following products does not match correctly with the reaction?A. B. C. D. |
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Answer» Correct Answer - D `CH_3CH_2CH=CH_2+HBr overset("Peroxide")CH_3CH_2CH_2CH_2Br` |
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| 39. |
Which of the following will not give iodoform test?A. `CH_(3)CH_(2)CH_(2)CH_(2)OH`B. `C_(2)H_(5)OH`C. `CH_(3)CHO`D. `CH_(3)COCH_(3)` |
| Answer» Correct Answer - A | |
| 40. |
Butanenitrile may be prepared by heatingA. propyl alcohol with KCNB. butyl alcohol with KCNC. butyl chloride with KCND. propyl chloride eith KCN |
| Answer» Correct Answer - D | |
| 41. |
Butanenitrile may be prepared by heatingA. propyl alcohol with KCNB. butyl chloride with KCNC. butyl alcohol with KCND. propyl chloride with KCN |
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Answer» Correct Answer - D `underset("Propyl chloride")(CH_3CH_2CH_2Cl)+KCN to underset("Butane nitrile")(CH_3CH_2CH_2CN)+KCl` |
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| 42. |
For the following `(i) I^(-) (ii) Cl^(-) (iii) Br^(-)` the increasing order of nucleophilicity would be:A. `Cl^(-) lt Br^(-) lt I^(-)`B. `I^(-) lt Cl^(-) lt Br^(-)`C. `Br^(-) lt Cl^(-) lt I^(-)`D. `I^(-) lt Br^(-) lt Cl^(-)` |
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Answer» Correct Answer - A In case of different nucleophiles but present in the same group of periodic table, larger is the size more is the nucleophilicity the increasing order of nucleophilicity of `X^(-)` ions is: `Cl^(-) lt Br^(-) lt I^(-)`. |
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| 43. |
The reaction `H_(2)C=CH-CH_(3)+CI_(2) overset(673K)(to) H_(2)C=CH-CH_(2)CI` proceeds through the intermediate formation of a :A. carbeneB. carbocationC. free radicalD. carbanion |
| Answer» Correct Answer - C | |
| 44. |
Assertion: Primary allylic halides show higher reactivity in `S_(N^(1))` reactions than other primary alkyl halides. ltBrgt Reason: Intermediate carbocation in allyl halides is stabilised by resonance.A. If both assertion and reason are correct and reason is correct explanation for assertionB. If both assertion and reason are correct but reason is not correct explanation for assertion.C. If assertion is correct but reason is incorrect.D. if both assertion and reason are incorrect. |
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Answer» Correct Answer - A Reason is the correct explanation for assertion. |
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| 45. |
`C_(2)H_(5)CI overset("Moist")underset(Ag_(2)O)(to) (A) overset(AI_(2)O_(3))underset(360^(@)C)(to) (B) overset(S_(2)CI_(2))(to)(C) ` In the above sequence of reactions identify (C)A. chloretoneB. chloropicrinC. mustard gasD. lewisite gas |
| Answer» Correct Answer - C | |
| 46. |
Which of the following is not an allylic halide?A. 4-Bromopent-2-eneB. 3-Bromo-2-methylbut-1-eneC. 1-Bromo-2-eneD. 4-Bromobut-1-ene |
| Answer» Correct Answer - D | |
| 47. |
Compound `C_(4)H_(8)CI_(2) (A)` on hydrolysis gives a compound `C_(4)H_(8)O(B)` which reacts with hydroxylamine and does not give any test with Tollens reagent . What are (A) and (B) ?A. 1,1-Dichlorobutane and butanalB. 2,2-Dichlorobutane and butanalC. 1,1-Dichlorobutane and butan-2-oneD. 2,2-Dichlorobutane and butan-2-one |
| Answer» Correct Answer - D | |
| 48. |
1-Bromopropane and 2-bromopropane on treatment with sodium in presence of ether gives:A. n-hexaneB. 2,3-dimethylbutaneC. 2-methylpentaneD. a mixture of all these different alkanes |
| Answer» Correct Answer - D | |
| 49. |
In the reaction , `HC-=CH +2CI_(2) to CHCI_(2) -CHCI_(2)` , The product is :A. called westrosolB. used as a solventC. used as a fire-extinguisherD. used as an anaesthetic |
| Answer» Correct Answer - B | |
| 50. |
the order of reactivity of alkyl halides depends upon:A. nature of alkyl groupB. nature of halogen atomC. nature of both alkyl group and halogen atomD. none of the above |
| Answer» Correct Answer - C | |