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 and ketones are carbonyl compounds. Which of them react both with NaBH4and with Tollen's reagent

Question # 2

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

Question # 3

Which is mild oxidizing agent ?

Question # 4

Which of the following will have the highest boiling point?

Question # 5

The color of ppts formed by Benedirct's test is

Question # 6

Iodoform test is given by:

Question # 7

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

Question # 8

Acetone is oxidized with

Question # 9

Which of the following compounds does not react with NaHSO3?

Question # 10

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

Question # 11

Which of the following is hypnotic?

Question # 12

Benzophenone can be converted into benzene using

Question # 13

Which one of the following reagents will distinguish between C6H5CHO and C6H5COCH3

Question # 14

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

Question # 15

On heating acetaldehyde with ammonical silver nitrate solution, we get

Question # 16

Reductive ozonolysis of benzene produces

Question # 17

The base used in Cannizzaro's reaction is

Question # 18

Aldol condensation is actually

Question # 19

The colour of ppts formed by Fehling's test is

Question # 20

Wolf-kishner reduction is used for the reduction of

Question # 21

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 22

A compound possessingα-hydrogen atom, in the presence of dilute alkali formsβ-hydroxy aldehyde. This product on heating with dilute acid forms an unsaturated crotonaldehyde. The compound is

Question # 23

Which is not true about acetophenone?

Question # 24

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

Question # 25

The homologous series of aldehydes and ketones have general formula:

Question # 26

Common names of aldehydes are given by corresponding:

Question # 27

Ketones are prepared by the oxidation of

Question # 28

On adding sodium nitroprusside ketones give

Question # 29

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

Question # 30

Chromyl chloride and toluene react to produce

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 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
A. CH3CHO
B. CH3CH2OH
C. CH3CH2COCH3
D. CH3CH2CH2CHO
2 Common names of aldehydes are given by corresponding:
A. Ketone
B. Alcohol
C. Carboxylic acid
D. ester
3 The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product
A. CH3CH(OH)COOH
B. CH3CH2CH(OH)COOH
C. (CH3)2C(OH)COOH
D. CH3CH2CH2COOH
4 In aldol condensation reaction, a double bond is formed between ______ and ______ carbon atoms
A. αandβ
B. αandα
C. αand Y
D. None of these
5 Chromyl chloride and toluene react to produce
A. p-chlorotoluene
B. Benzaldehyde
C. Benzyl chloride
D. Bezoic acid
6
Question Image
A. Br2(aq)
B. 2, 4-dinitrophenylhydrazine
C. NaBH
D. Tollen's reagent
7 Cannizzzaro's reaction is not given by:
A. Formaldehyde
B. Acetaldehyde
C. Benzaldehyde
D. Trimethyl
8 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
9 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
10 Which of these reactions is shown by buranone, CH3COCH2CH3
A. On warming with acidified potassium dichromative (IV) the solution turns green
B. On heating with Fehling's reagent a red precipitate is formed
C. With 2,4-dinitrophenlhydrazine reagent an orange precipitate is formed
D. With hydrogen cyanide an aldehyde is formed

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