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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the statements are correct about the reaction given below ? A. Formation of (B) by Path I is much more faster than by Path II.B. Formation of (B) by Path II is much more faster than by Path I.C. Formation of (B) by both paths is equal.D. (B) is formed by Path II only. |
| Answer» Correct Answer - A | |
| 2. |
Which of the statements are correct about the given reaction ? A. Two enantiomeric products are obtained.B. Three products, racemate, and meso products are obtained.C. The reaction proceeds vid the formation of radical anion.D. The reaction is called Pinacol-Pinacolone rearrange- |
| Answer» Correct Answer - B::C | |
| 3. |
Which of the following reactions are correct ?A. B. C. D. |
| Answer» Correct Answer - A::B | |
| 4. |
Which of the statements are about the following reaction ? A. Ketones are more reactive than RCOCl, therefore ketones further react with RMgX to give `3^(@)` alcohols.B. `(C-Mg)` bond is more ionic than `(C-Cu)` or `(C-Cd)` bond.C. Nucleophile `R^(overset(..)(Θ))` from Grignard reagent is more reactive and the reaction of RMgX with RCOCl is a nucleophilic addition reaction.D. Cu or Cd forms complex with Cl of RCOCl, `[R-overset(delta+)underset(O)underset(||)C...Cl...overset(delta-)CdR_(2)]`, similar to acylium-like ion with greater `(delta+)` charge on C, which bonds even with the weakly nucleophilic R of `R_(2)Cd` or `R_(2)CuLi`. |
| Answer» Correct Answer - A::B::C::D | |
| 5. |
Find out which statement is correct.A. Path I proceeds by nucleophilic addition `(HOO^(Θ))` on the `(C=C)` bond followed by Michael addition with (A) to give `alpha`-carbanion which displaces `overset(Θ)(OH)` form `(HOO)` group to give epoxide (B).B. Path II proceeds by electrophilic addition `(overset(Θ)(OH))` on the `(C=C)` bond followed by the removal of H from `(OH)` by nucleophile `(RCOO^(Θ))` to give epoxide (B).C. Path I is faster since it proceeds by the formation of resonance-stabilised `alpha`-carbanion as shown. D. Path II is faster since it proceeds by the formation of epoxide ion |
| Answer» Correct Answer - A::B::C | |
| 6. |
For the Cannizzaro reaction in which of the statement is true regarding order and molecularity of the reaction ?A. `R=K [Ald]^(2)[OH^(-)]^(2)` , 4th order, bimolecularB. `R=K [Ald]^(2)[OH^(-)]`, 3rd order, bimolecularC. `R=K [Ald]^(2)[OH^(-)]^(2)`, 4th order, tetramolecularD. `R=K[Ald]^(2)[OH^(-)]`, 3rd order, trimolecular |
| Answer» Correct Answer - B | |
| 7. |
For the Cannizzaro reaction in which of the following statements is true regarding order and molecularity of the reaction ?A. `R=K [Ald]^(2)[OH^(-)]^(2)` , 4th order, bimolecularB. `R=K [Ald]^(2)[OH^(-)]`, 3rd order, bimolecularC. `R=K [Ald]^(2)[OH^(-)]^(2)`, 4th order, tetramolecularD. `R=K[Ald]^(2)[OH^(-)]`, 3rd order, trimolecular |
| Answer» Correct Answer - A | |
| 8. |
The products are:A. B. C. D. |
| Answer» Correct Answer - A | |
| 9. |
Prodect (B) is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 10. |
Which of the following are correct (B) and (C ) products, respectively ? I. II. , III. IV. , v. A. (I), (V)B. (I), (III)C. (II), (V)D. (II), (IV) |
| Answer» Correct Answer - D | |
| 11. |
Which of the following statements are correct about the following reaction A. In the formation of (C ) from (A) or (B), expansion of ring takes place.B. In the formation of (C ) from (A) or (B), contraction of ring takes place.C. Product (C ) is D. Product (C ) is |
| Answer» Correct Answer - B::C | |
| 12. |
Which of the following statements are correct about Wolff-Kishner reduction ? A. Hydrazone intermediate compound is formed.B. In basic conditions, migration of double bond occurs with the loss of `N_(2)`.C. Reaction is thermodynamically favoured due to the loss of `N_(2)`.D. Reaction is thermodynamically not favoured due to the migration of double bond. |
| Answer» Correct Answer - A::B::C | |
| 13. |
During the reaction between carbonyl compounds with ammonia derivatives, a proper pH is required. Select the correct reasons.A. The increase positive charge on the C atom of `(C=O)` group for the better attack of nucleophilic centre of ammonia derivative, a small amount of acid is needed.B. With excess of acid, ammonia derivatives form their salts and act as strong nucleophilies.C. With excess of acid, ammonia derivatives form their salts and cannot act as nucleophilies.D. The proper pH required for these reactions is nearly `3.5`. |
| Answer» Correct Answer - A::C::D | |
| 14. |
Which of the following statements are correct about the bisulphite addition product of a carbonyl compound ?A. The nucleophile is `HSO_(3)^(Θ)`.B. The nucleophile is `SO_(3)^(2-)`.C. The `(C-S)` bond is formed rather than `(C-O)` bond because O is more nucleophilic than S.D. The bisulphite adduct can be regenerated to carbonyl compound by both acid base. |
| Answer» Correct Answer - B::D | |
| 15. |
Which of the following statements are correct about the above reaction ?A. Product (B) is B. Product (B) is C. Product (C ) is D. Product (C ) is |
| Answer» Correct Answer - A::C | |
| 16. |
Find which of the following statements are correct ?A. Product (D) is a polyamide called Nylon-5.B. Product (D) is a polyamide called Nylon-6.C. Common name of (C ) is `delta`-amino valeric acid.D. IUPAC name of (C ) is 5-amino pentanoic acid. |
| Answer» Correct Answer - A::C::D | |
| 17. |
Which of the statements are correct about the reaction ? (A) `overset(H^(o+))underset(Delta)rarr` (B) `overset(H_(2)O^(o+))rarr` (C ) `overset(Delta)rarr` (D)A. (B) is a six-membered cyclic lactam.B. (B) is a five-membered cyclic lactam.C. Formation of (B) from (A) is Beckmann reacrtio.D. Formation of (B) from (A) is Beckmann rearrangment reaction. |
| Answer» Correct Answer - A::D | |
| 18. |
When (A) is refluxed in aq. HCI, the product (C ) is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 19. |
`overset(NaNO_(2)+HCI)rarr` (B) `overset((i)Ac_(2)O)underset((ii)H_(2)O^(o+))rarr` (C ) The final product (C ) is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 20. |
`overset("High conc. of base")rarr` ? + ? The products are:A. B. C. D. |
| Answer» Correct Answer - C | |
| 21. |
When `CH_(3)CHO` is reacted in the presence of a base with excess of HCHO, which statement is true ?A. Only aldol-type (Claisen-schmidt) reaction takes place.B. Only Cannizzaro-type (crossed Cannizzaro) takes place.C. First aldol-type and then Cannizzaro-type reaction takes place.D. Fiest Cannizzaro-type and then aldol-type reaction takes place. |
| Answer» Correct Answer - C | |
| 22. |
`2(A)overset(OH^(o+))rarr` (B) + (C ). The product (C ) finds application in:A. An explosive when it is converted to tetranitrate esterB. DetergentsC. BothD. None |
| Answer» Correct Answer - C | |
| 23. |
Of the following which compound is an acetal ?A. B. C. D. |
| Answer» Correct Answer - B | |
| 24. |
Which of the following is paraldehyde ?A. `(HCHO)_(n)`B. `(CH_(3)CHO)_(3)`C. `(HCHO)_(3)`D. `(CH_(3)CHO)_(4)` |
| Answer» Correct Answer - B | |
| 25. |
In the Cannizzaro reaction given below: `2Ph-CHO overset(overset(Θ)OH)rarrPh-CH_(2)OH+PhCO_(2)^(-)` the slowest step is:A. The attack of `overset(Θ)(OH)` at the carbonyl group.B. The transfer of hydride to the carbonyl group.C. The abstraction of proton from the carboxylic acid.D. The deprotonation of `Ph-CH_(2)OH`. |
| Answer» Correct Answer - B | |