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

Aldehydes are reduced to :

Question # 2

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

Question # 3

Chromic acid used to oxidize

Question # 4

The IUPAC name fo CH3COCH (CH3)2is

Question # 5

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

Question # 6

Which of the following does not turn Schiff's reagent to pink?

Question # 7

Which of the following compounds will not give iodoform test on treatment with I2/ NaOH?

Question # 8

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

Question # 9

Aldehydes can be distinguished from ketones by

Question # 10

Which is not true about acetophenone?

Question # 11

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 # 12

Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?

Question # 13

An organic compound has the following properties ; It gives a positive tri-iodomethane test; it gives a yellow ppt, with 2, 4-DNP regent; it does not react with Tollen's reagent . Which compound would give these results

Question # 14

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 15

Which of the following reactions is used for detecting presence of carbonyl group?

Question # 16

Dehydration of allcohol gives:

Question # 17

What is formed when propanone is refluxed with an anhydrous solution of NaBH4

Question # 18

Reduction of aldehydes with HI and P gives

Question # 19

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

Question # 20

Which of the following compounds does not react with NaHSO3?

Question # 21

Which of the following compounds will react with Tollen's reagent

Question # 22

Clemensen's reduction of ketones is carried out in

Question # 23

Wacker method involves the conversion of alkene using PdCl2into corresponding

Question # 24

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

Question # 25

Reaction of Grignard's reagent with formaldehyde gives:

Question # 26

Which one of the following is a product of the reaction between C6H5CH2OH and CH3COCI

Question # 27

Cannizzaro's reaction is type of reaction:

Question # 28

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

Question # 29

Which of the following will have the highest boiling point?

Question # 30

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

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Which isomer of C5H11OH gives, one dehydration, the greastest number of different alkenes
2 Which of the following compounds does not react with NaHSO3?
A. C6H5CHO
B. Acetophenone
C. Acetone
D. Acetaldehyde
3 Acetone reacts with HCN to form a cyanohydrin. It is an example of:
A. Nucleophilic substitution
B. Nucleophilic addition
C. Electrophilic addition
D. Electrophilic substitution
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 The catalytic prmoter used for the industrial preparation of acetaldehyde is
A. PdCI2
B. CuCI2
C. Pd + CaCI2
D. None of these
6 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
7 Chromic acid used to oxidize
A. Aldehyde
B. Ketone
C. Both a and b
D. None of these
8 Distillation of calcium salts of acetic acid and formic acids gives acetaldehyde. What compound would be obtained if only calcium salt of acetic acid is distilled
A. Formaldehyde
B. Butyraldehyde
C. Propionaldehyde
D. Acetone
9 Which one of the following is a product of the reaction between C6H5CH2OH and CH3COCI
A. C6H5OCOCH3
B. C6H5CH2CI
C. C6H5CH2OCOCH3
D. C6H5CH2COCI
10 Which is used for the reduction of aldehydes and ketones
A. NaBH4
B. Pt/Pd
C. Ni
D. All of these

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