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

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 # 2

Aldehydes are oxidizes are to give:

Question # 3

A compound A has a molecular formula C2Cl3OH. It reduces Fehling solution and on oxidation produces a monocarboxylic acid B.A can also be obtained by the action of Cl2on Ethanol. A is

Question # 4

The carbon atom of a carbonyl group is

Question # 5

Aldehydes is distinguished from ketones by using

Question # 6

Cannizzaro reaction is not given by

Question # 7

At room temperature formaldehyde is

Question # 8

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

Question # 9

Which of the following compounds will react with reagent ?

Question # 10

Aldehydes which do not haveα-hydrogen undergo

Question # 11

Ketones are prepared by the oxidation of

Question # 12

Aledehydes ketones can be prepared form alcohols by their:

Question # 13

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

Question # 14

Which of the following will have the highest boiling point?

Question # 15

The catalytic prmoter used for the industrial preparation of acetaldehyde is

Question # 16

Which is mild oxidizing agent ?

Question # 17

The colour of ppts formed by Fehling's test is

Question # 18

Propyne on hydrolysis in presence of H2SO4and HgSO4gives

Question # 19

For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test

Question # 20

Silver mirror test is applied for

Question # 21

Which of the following reagent will react with both aldehyde and ketones?

Question # 22

Which is used for the reduction of aldehydes and ketones

Question # 23

Aldehydes can be distinguished from ketones by

Question # 24

Iodoform test is given by:

Question # 25

Formalin is:

Question # 26

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 27

Cannizzaro's reaction is type of reaction:

Question # 28

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

Question # 29

The carbon of a carbonyl group is:

Question # 30

On adding sodium nitroprusside ketones give

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Compounds X, Y and Z, all react with PCI5to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z
2 Tollen's reagent is
A. Ammonical cuprous chloride
B. Ammonical cuprous oxide
C. Ammonical silver bromide
D. Ammonical silver nitrate
3 A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI5in the cold What could R be
4 Which of the following does not react with phenyl hydrazine?
A. Ethanol
B. Ethanal
C. Acetone
D. Acetophenone
5 Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution
A. White
B. Red
C. Yellow
D. None of these
6 Ketones are reduced to
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. All of these
7 Aldelydes are the oxidation product of
A. P-alcohols
B. s-alcohols
C. ter-alcohols
D. carboxylic acids
8 Cannizzzaro's reaction is not given by:
A. Formaldehyde
B. Acetaldehyde
C. Benzaldehyde
D. Trimethyl
9 Ethanal may be converted into a three-carbon acid in a two-step process.
Which compound is the intermediate
A. CH3CO2H
B. CH3CN
C. CH3CH2CN
D. CH3CH(OH)CN
10 Aldehydes are reduced to :
A. Pri-alcohol
B. Sec-alcohol
C. Ter-alcohol
D. All of these

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