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 product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

Question # 2

In formadaldehyde and KOH are heated then we get

Question # 3

Isopropyl alcohol on oxidation forms

Question # 4

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

Question # 5

Chromyl chloride and toluene react to produce

Question # 6

Aldehydes can be distinguished from ketones by using

Question # 7

Common names of aldehydes are given by corresponding:

Question # 8

C2H5CHO and (CH3)2CO can be distunguished by testing with

Question # 9

At room temperature formaldehyde is

Question # 10

Acetone is prepared by

Question # 11

Give IUPAC name fo Acetone

Question # 12

Benzophenone can be converted into benzene using

Question # 13

The carbon atom of a carbonyl group is

Question # 14

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

Question # 15

Aldehydes is distinguished from ketones by using

Question # 16

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

Question # 17

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

Question # 18

Which is used for the reduction of aldehydes and ketones

Question # 19

Cannizzaro's reaction in not given by

Question # 20

Reductive ozonolysis of benzene produces

Question # 21

In Tolten's best, the end product is ______ formed

Question # 22

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Question # 23

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

Question # 24

The catalytic prmoter used for the industrial preparation of acetaldehyde is

Question # 25

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

Question # 26

Wacker method involves the conversion of alkene using PdCl2into corresponding

Question # 27

Aldehydes are reduced to :

Question # 28

Acetal is produced by reacting alcohol in the presence of dry HCl with

Question # 29

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

Question # 30

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

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Aldehydes are oxidizes are to give:
A. Primary alcohol
B. Sec-alcohol
C. Ter-alcohol
D. Carboxylic acid
2 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
3 The color of ppts formed by Benedirct's test is
A. Brick red
B. Wine red
C. Yellow
D. Orange
4 Which of the following reactions is used for detecting presence of carbonyl group?
A. Reaction with hydroxylamine
B. Reaction with hydrazine
C. Reaction with phenyl hydrazine
D. All
5 Cannizzaro reaction is not given by
A. Trimethyl acetaldehyde
B. Acetaldehyde
C. Benzaldehyde
D. Formaldehyde
6 Acetone reacts with HCN to form a cyanohydrin. It is an example of
A. Electrophilic addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Nucleophilic substitution
7 Cannizzzaro's reaction is not given by:
A. Formaldehyde
B. Acetaldehyde
C. Benzaldehyde
D. Trimethyl
8 Isopropyl alcohol on oxidation forms
A. Acetone
B. Ether
C. Ethylene
D. Acetaldehyde
9 Which of the following does not react with phenyl hydrazine?
A. Ethanol
B. Ethanal
C. Acetone
D. Acetophenone
10 Self condensation of acetaldehyde in the presence of dilute alkalies gives
A. An acetal
B. An aldol
C. Mesitylene
D. Propionaldehyde

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