ECAT Pre Engineering Chemistry Chapter 23 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 23 Aldehydes and Ketones

Try The MCQ's Test For ECAT Chemistry Chapter 23 Aldehydes and Ketones

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ECAT Chemistry Chapter 23 Aldehydes and Ketones

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Question # 1

The addition of HCN to carbonyl compounds is an example of

Question # 2

Which of the following is hypnotic?

Question # 3

Cannizzaro reaction is not given by

Question # 4

Aledehydes ketones can be prepared form alcohols by their:

Question # 5

The IUPAC name fo CH3COCH (CH3)2is

Question # 6

On heating acetaldehyde with ammonical silver nitrate solution, we get

Question # 7

Clemensen's reduction of ketones is carried out in

Question # 8

When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is

Question # 9

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

Question # 10

In aldol condensation reaction, a double bond is formed between ______ and ______ carbon atoms

Question # 11

In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?

Question # 12

In carboxyl group the bond between C and oxygen is:

Question # 13

Formalin is an aqueous solution of

Question # 14

Cannizzaro's reaction in not given by

Question # 15

Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent

Question # 16

Which of the following reagents is used to distinguish acetone and acetophenone

Question # 17

Acetone is oxidized with

Question # 18

Which one of the following statement is wrong regarding differences between aldehydes and ketones

Question # 19

Ketones are prepared by the oxidation of

Question # 20

Which reaction yields Bakelite?

Question # 21

Aldehydes can be distinguished from ketones by using

Question # 22

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

Question # 23

The color of ppts formed by Fehling's test is

Question # 24

An organic compound 'A' has the molecular formula C3H6O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C9H14O. A and B, respectively are

Question # 25

Which isomer of C5H11OH gives, one dehydration, the greastest number of different alkenes

Question # 26

Acetone reacts with HCN to form a cyanohydrin. It is an example of

Question # 27

Chromyl chloride and toluene react to produce

Question # 28

Dehydration of allcohol gives:

Question # 29

Chromic acid used to oxidize

Question # 30

Iodoform test is given by:

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Which of the following does not react with phenyl hydrazine?
A. Ethanol
B. Ethanal
C. Acetone
D. Acetophenone
2 Which is mild oxidizing agent ?
A. Tollen's reagent
B. KMnO4 / H2SO4
C. K2Cr2O7 / H2SO4
D. HNO3
3 Ketons are prepared by the oxidation of
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. None of these
4 Ketones are prepared by the oxidation of:
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. None of these
5 Acetone is oxidized with
A. Tollen's reagent
B. Fehling solution
C. Acidic dichromate solution
D. Benedicts solution
6 Dehydration of allcohol gives:
A. Alkane
B. Alkene
C. Aldehyde
D. ketone
7 Condensation of aldeydes withα-hydrogen gives:
A. Acetal
B. Ketal
C. Aldol
D. Cannizzaro product
8 Formaldehyde is used to make
A. Plastics
B. Medicine
C. Antiseptic
D. All of these
9 For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test
A. HCHO and CH3CHO
B. CH3CHO and CH3COCH
C. CH3COCH3and C6H5COCH3
D. CH3COOH and CH3COOCH3
10 Aldehydes are oxidizes are to give:
A. Primary alcohol
B. Sec-alcohol
C. Ter-alcohol
D. Carboxylic acid

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