ALDEHYDE & KETONES

1. The abstraction of proton will be fastest, in which carbon in the following compound,

(A)x (B) y(C) z (D)p

2 Which of the following will be most acidic?

(A) (B)

(C) (D)

3. Which of the following will give more enol contents?

(A)I (B) II(C) III (D)IV

4.

A, B and C are

(A) (B)

(C) (D) None

CH3

O

CH3

O

CH3 CH3

O

CH3

O

CH3

CH3

5.

Product D is,(A) (B)

(C)(D)

None

6.

The product is

(A)(B)

(C) (D)

7.

Aliphatic and aromatic aldehydes can be differentiated by the use of (A)Fehling solution (B) Tollen's regent (C) KMnO4/H+/ (D)conc. HNO3/

8. Aromatic aldehydes are less reactive than aliphatic halides in nucleophilic addition and can be distinguished by Fehling solution.

In the reaction sequence

C6H5 CH2 CH3 product product will be

(A)C6H5 CH2 - COOH (B) C6H5 - COOH, COOH - COOH and CHBr3

(C) C6H5 CH3, CO2 and CHBr3 (D)Only CHBr3

H5C2 NH2

9. In the reaction sequence

A + B C6H5 - CH = CHO(A) and (B) will be (A)C6H5 - CHO and CH3CHO (B) C6H5 - CH2 - CHO and CH3CHO(C) C6H5 - CHO and CH3CH2CHO (D)C6H5COCH3 and CH3CHO

10. The most reactive compound towards cyanohydrin Formation is

(A) Ph - CHO (B)

(C) (D) Ph - CH2 - CHO

11.

(A) (B)

(C) (D)

12. In the reaction sequence

(X) will be

(A) (B)

(C) (D)

13. One of the reagent of Reformatsky reaction is:

(A) Br – CH2COOC2H5 (B)

(C) (D) All of these

14.

(A) (B)

(C) (D)

15. The reduction:

can be best carried out by(A)Clemmensen’s reduction (B) Wolff-Kishner reduction(C) NaBH4 (D)LiAlH4

16. A mixture of (CH3)3C – CHO and HCHO on heating with aqueous NaOH solution will give:(A)HCOONa + (CH3)3C – CH2OH (B) (CH3)3C – COONa + CH3OH(C) HCOONa + (CH3)3C – COONa (D)CH3OH + (CH3)3C – CH2OH

17

(A) (B)

(C) (D) None of these

18. Which of the following will be most readily dehydrated in acidic condition?

(A) (B)

(C) (D)

19. Which of the following reduces Tollen’s reagent?

(A) (B)

(C) (D)

20. Tollen’s reagent is reduced by i) HCOOH ii) Aldehydes and -hydroxy ketonesiii) is a -hydroxy ketone