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. |
In `S_(n^(2)` reaction, the first step involves the formation of :A. free radicalB. carbanionC. carbocationD. final product |
| Answer» Correct Answer - C | |
| 2. |
The rate law for the reaction `RCl+Na(aq.)rarrROH+NaCl` is given by, rate `=K_(1)[RCl].` The rate of the reaction will be :A. doubled on doubling the concentration of sodium hydroxideB. halved on reducing the concentration of alkyl halide to halfC. decreased on increasing the temperature of the reactionD. unaffected by inceasing the temperature of the reaction |
| Answer» Correct Answer - B | |
| 3. |
Order of rate of reaction of following compound with phenyl magnesium bromide is : `Me-overset(O)overset(||)underset(I)C-Cl, Me-overset(O)overset(||)underset(II)C-H, Me-overset(O)overset(||)underset(III)C-O-Et`A. `IgtIIgtIII`B. `IIgtIIIgtI`C. `IIIgtIgtII`D. `IIgtIgtIII` |
| Answer» Correct Answer - A | |
| 4. |
2-Phenylethanol may be prepared by the reaction of phenyl magnesium bromide with :A. HCHOB. `CH_(3)CHO`C. `CH_(3)COCH_(3)`D. |
| Answer» Correct Answer - D | |
| 5. |
Vinylic halides are unreactive towards nucleophilic substitution because of the following except :A. C-halogen bond is strongB. The halogen is bonded to `sp^(2)` carbonC. A double bond character is developed in the carbon-halogen bond by resonanceD. Halide ions are not good leaving groups |
| Answer» Correct Answer - C | |
| 6. |
Which of the following reactions involve free radical as intermediate ?A. B. C. D. |
| Answer» Correct Answer - B::C::D | |
| 7. |
Which of the following reactions involve benzyne intermediate?A. B. C. D. |
| Answer» Correct Answer - A::B::C | |
| 8. |
Find out numbers of possible `E_(1)` products from following reaction . |
| Answer» Correct Answer - 4 | |
| 9. |
Which of the following are possible intermediate in the following reaction ? A. B. C. D. |
| Answer» Correct Answer - A::C | |
| 10. |
Which of the following reaction is possible ?A. `C_(6)H_(5)OH+HBrrarrC_(6)H_(5)Br+H_(2)O`B. `(CH_(3))_(3)CCl+NaOCH_(3)rarr(CH_(3))_(3)COCH_(3)+NaCl`C. D. |
| Answer» Correct Answer - D | |
| 11. |
Which of the following compounds is not suitable solvent for Grignard reagent?A. B. C. D. |
| Answer» Correct Answer - C | |
| 12. |
Suggest the suitable solvent for the reaction given below. A. `H_(2)O`B. `C_(2)H_(5)OH`C. `HCONMe_(2)`D. `C_(6)H_(6)` |
| Answer» Correct Answer - C | |
| 13. |
What is the principal product of the following reaction ? A. B. C. D. |
| Answer» Correct Answer - C | |
| 14. |
`H_(3)C-overset(CH_(3))overset(|)CH-underset(Cl)underset(|)CH-CH_(3)underset(Elimination)overset(Hofmann)rarrunderset(darrHBr//hv)((B))overset(HBr)rarr(C)` Correct order of rate of `S_N^(2)` for A, C and D will be :A. `AgtCgtD`B. `CgtDgtA`C. `AgtDgtC`D. `CgtAgtD` |
| Answer» Correct Answer - D | |
| 15. |
An alkyl halide may be converted into an alcohol by :A. additionB. susbstitutionC. dehydrohalogenationD. elimination |
| Answer» Correct Answer - B | |
| 16. |
Which of the following leads to the formation of an alkyl halide ?A. `C_(2)H_(5)OHoverset(" Red " P+Br_(2))rarr`B. `C_(2)H_(5)OHoverset(SOCl_(2))rarr`C. `C_(2)H_(5)OHoverset(KBr+Conc.,H_(2)SO_(4))rarr`D. All of these |
| Answer» Correct Answer - D | |
| 17. |
(A), Product (A) in this reaction is :A. B. C. D. |
| Answer» Correct Answer - C | |
| 18. |
which alkyl halide will react fastest with aqueous methanol ?A. `Me_(3)C-Br`B. `Me_(3)C-Cl`C. `Me_(2)CH-Br`D. `CH_(3)-CH_(2)-CH_(2)-Br` |
| Answer» Correct Answer - A | |
| 19. |
Optically pure `(S)-(+)`-2bromo octane `[alpha]_(D)^(25^(@)C)=+36^(@)`, react with aqueous NaOH in acetone to give optically pure `(R)-(-)`-2-octanol `[alpha]_(D)^(25^(@)C)` `=-10.3^(@)`. With partially racemized bromo compound whose `[alpha]_(D)^(25^(@)C)`=30^(@)`, the `[alpha]_(D)^(25^(@)` of the alcohol product is - `6.0^(@)`. Calculate the percentage of frontside attack :A. `15%`B. `85%`C. `30%`D. `58%` |
| Answer» Correct Answer - A | |
| 20. |
Optically pure `(S)-(+)`-2bromo octane `[alpha]_(D)^(25^(@)C)=+36^(@)`, react with aqueous NaOH in acetone to give optically pure `(R)-(-)`-2-octanol `[alpha]_(D)^(25^(@)C)` `=-10.3^(@)`. With partially racemized bromo compound whose `[alpha]_(D)^(25^(@)C)`=30^(@)`, the `[alpha]_(D)^(25^(@)` of the alcohol product is - `6.0^(@)`. Calculate the per cent optical purity of partially racemized bromo compound :A. `58%`B. `83%`C. `70%`D. `30%` |
| Answer» Correct Answer - B | |
| 21. |
Major Product :A. B. C. D. No reaction |
| Answer» Correct Answer - C | |
| 22. |
Find the nature of folllowing reaction :A. `S_(N^(2))`B. `S_(N^(2))`C. `E_(2)`D. `E_(1)cb` |
| Answer» Correct Answer - A | |
| 23. |
`H_(2)C=CH-Cl` can undergo :A. addition reactionB. elimination reactionC. substitution reactionD. electrophilic substitution reaction |
| Answer» Correct Answer - A::B | |
| 24. |
Aryl halide undergo :A. Fittig reactionB. Ulmann reactionC. Wurtz reactionD. Grignard reagent synthesis |
| Answer» Correct Answer - A::B::D | |
| 25. |
Find the major product of the reaction : A. B. C. D. Both (a) and (b) |
| Answer» Correct Answer - B | |
| 26. |
`R-X+Mgoverset(Ether,Delta)rarroverset(delta-)R-overset(delta+)Mg-X` Grignard reagents may be prepared from `1^(@) , 2^(@)" and "3^(@)` halides as well as from vinayl and aryl halide. Vicinal dihalide and those halide which contain acidic tail do not form Grignard reagent. Which of the following halides is most reactive for the preparation of Grignard reagent?A. B. C. D. |
| Answer» Correct Answer - D | |
| 27. |
`R-X+Mgoverset(Ether,Delta)rarroverset(delta-)R-overset(delta+)Mg-X` Grignard reagents may be prepared from `1^(@) , 2^(@)" and "3^(@)` halides as well as from vinayl and aryl halide. Vicinal dihalide and those halide which contain acidic tail do not form Grignard reagent. Which of the following compounds can form Grignard reagent on reaction with Mg//Ether?A. B. C. D. |
| Answer» Correct Answer - C::D | |
| 28. |
`R-X+Mgoverset(ether)rarrR-MgXoverset(CH_(3)OH)rarr` n-butane What can be R in the above reaction sequence ?A. n-propylB. n-butylC. sec-butylD. Isopropyl |
| Answer» Correct Answer - B::C | |
| 29. |
What is the prodcut of the reaction of ethylbromide with the nucleophiles `CH_(3)OH`?A. `CH_(3)CH_(2)OCH_(3)`B. `CH_(3)CH_(2)NH_(2)`C. `CH_(3)CH_(2)N^(+)(CH_(3))_(2)Br^(-)`D. None of these |
| Answer» Correct Answer - A | |
| 30. |
The relative reactivity of following halides toward `S_(N^(2))` reaction follows the roder : A. `QgtSgtRgtP`B. `PgtSgtRgtQ`C. `SgtRgtQgtP`D. `PgtRgtSgtQ` |
| Answer» Correct Answer - D | |
| 31. |
Which of the following statements are correct for nucleophile?A. All negatively charged species are nucleophilesB. Nucleophiles are Lewis basesC. Alkenes, alkynes, benzene and pyridine are nucleophilesD. All are correct |
| Answer» Correct Answer - D | |
| 32. |
Major product :A. B. C. D. |
| Answer» Correct Answer - B | |
| 33. |
Consider the species. `overset(Θ)OH` `CH_(3)-overset(overset(Θ)O` `overset(Θ)CH_(3)` `overset(Θ)NH_(2)` Arrange these nucleophilic species in their decreasing order of nucleophilicity :A. `IIIgtIVgtIgtII`B. `IIgtIgtIIIgtIV`C. `IgtIIgtIIIgtIV`D. `IIIgtIgtIIgtIV` |
| Answer» Correct Answer - A | |
| 34. |
The nucleophilicities of `CH_(3)^(-),NH_(2)^(-),OH^(-)" and "F^(-)` decrease in which order ?A. `CH_(3)^(-)gtNH_(2)^(-)gtOH^(-)gtF^(-)`B. `OH^(-)gtNH_(2)^(-)gtCH_(3)^(-)gtF^(-)`C. `NH_(2)^(-)gtOH^(-)gtCH_(3)^(-)gtF^(-)`D. `CH_(3)^(-)gtOH^(-)gtF^(-)gtNH_(2)^(-)` |
| Answer» Correct Answer - A | |
| 35. |
Arrange the following in decreasing order of `E_(2)` reaction : A. `XgtYgtZ`B. `XgtZgtY`C. `YgtZgtX`D. `ZgtYgtX` |
| Answer» Correct Answer - D | |
| 36. |
Arrange the following in decreasing order `E_(2)` reaction :A. `XgtYgtZ`B. `XgtZgtY`C. `ZgtXgtY`D. `YgtXgtZ` |
| Answer» Correct Answer - B | |
| 37. |
The order of decreasing nucleophilicities of the following species is :A. `CH_(3)overset(Θ)SgtCH_(3)overset(Θ)OgtCH_(3)COoverset(Θ)OgtCH_(3)OH`B. `CH_(3)COoverset(Θ)OgtCH_(3)overset(Θ)SgtCH_(3)overset(Θ)OgtCH_(3)OH`C. `CH_(3)OHgtCH_(3)overset(Θ)SgtCH_(3)COoverset(Θ)OgtCH_(3)overset(Θ)O`D. `CH_(3)overset(Θ)OgtCH_(3)OHgtCH_(3)COoverset(Θ)OgtCH_(3)overset(Θ)S` |
| Answer» Correct Answer - A | |
| 38. |
The order of decreasing nucleophilicity of the following is :A. `H_(2)Ogtoverset(Θ)OHgtCH_(3)COoverset(Θ)OgtCH_(3)overset(Θ)O`B. `CH_(3)overset(Θ)Ogtoverset(Θ)OHgtCH_(3)COoverset(Θ)OgtH_(2)O`C. `CH_(3)COoverset(Θ)OgtCH_(3)overset(Θ)Ogtoverset(Θ)OHgtH_(2)O`D. `overset(Θ)OHgtCH_(3)overset(Θ)OgtCH_(3)COoverset(Θ)OgtH_(2)O` |
| Answer» Correct Answer - B | |
| 39. |
Find the product of the following reaction : A. B. C. D. |
| Answer» Correct Answer - A | |
| 40. |
Find the product of the following reaction : A. B. C. D. |
| Answer» Correct Answer - B | |
| 41. |
Find the major product of the following reaction : A. B. C. D. |
| Answer» Correct Answer - D | |
| 42. |
Find the major product of the following reaction : A. B. C. D. |
| Answer» Correct Answer - C | |
| 43. |
Find the major product of the following reaction : A. B. C. D. |
| Answer» Correct Answer - A | |
| 44. |
The end product of the following reaction is : Product :A. `alpha,beta-diketone`B. `alpha-hydroxy acid`C. 1,2-doilD. `beta-hydroxy acid |
| Answer» Correct Answer - B | |
| 45. |
In the given reaction Product Find the product of reaction :A. B. C. D. |
| Answer» Correct Answer - C | |
| 46. |
Product Product of reaction is :A. B. C. D. |
| Answer» Correct Answer - D | |
| 47. |
Which of the following are correct order of nucleophilcity in `CH_(3)OH`?A. B. `CH_(3)CH_(2)overset(Θ)OgtOoverset(Θ)HgtCH_(3)-overset(O)overset(||)C-overset(Θ)O`C. `F^(Θ)gtCl^(Θ)gtBr^(Θ)gtI^(Θ)`D. |
| Answer» Correct Answer - A::B::D | |
| 48. |
The reaction proceed by the mechanism :A. `S_(N^(1))`B. `S_(N^(2))`C. `S_(E)`D. `S_(N^(i))` |
| Answer» Correct Answer - B | |
| 49. |
The final product of the reaction is :A. B. C. D. |
| Answer» Correct Answer - B | |
| 50. |
Find the product of the following reaction, A. B. C. D. |
| Answer» Correct Answer - A | |