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

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

Question # 2

The carbon of a carbonyl group is:

Question # 3

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

Question # 4

Which of the following compounds does not react with NaHSO3?

Question # 5

Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre

Question # 6

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

Question # 7

Chromic acid used to oxidize

Question # 8

Which is mild oxidizing agent ?

Question # 9

Silver mirror test is applied for

Question # 10

Which of the following will have the highest boiling point

Question # 11

A common industrial solvent is a mixture of propanone; CH3COCH3, and pentyl ethanoate CH3CO2(CH2)4CH3. Which reagent would have no effect on this solvent

Question # 12

Which of the following will have the highest boiling point?

Question # 13

Which is used for the reduction of aldehydes and ketones

Question # 14

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

Question # 15

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

Question # 16

Hydroxyl amine is a derivative of::

Question # 17

Acetaldehyde is used to make

Question # 18

Which of the following in incorrect?

Question # 19

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

Question # 20

Which of the following is hypnotic?

Question # 21

On adding sodium nitroprusside ketones give

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

Ethanal may be converted into a three-carbon acid in a two-step process.
Which compound is the intermediate

Question # 24

Which of the following does not react with phenyl hydrazine?

Question # 25

Calcium acetate when dry distilled gives

Question # 26

Reaction of Grignard's reagent with formaldehyde gives:

Question # 27

Dehydration of allcohol gives:

Question # 28

Cannizzaro reaction is not given by

Question # 29

Ketons are prepared by the oxidation of

Question # 30

Wolf-kishner reduction is used for the reduction of

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Aldehydes are produce in atmosphere by
A. Oxidation of secondary alcohols
B. Reduction of alkenes
C. Reaction of oxygen atoms with hydrocarbons
D. Reaction of oxygen atoms with ozone
2 Aldelydes are the oxidation product of
A. P-alcohols
B. s-alcohols
C. ter-alcohols
D. carboxylic acids
3 From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?
A. HCHO
B. CH3CHO
C. CH3COCH3
D. CO2
4 At room temperature formaldehyde is
A. Gas
B. Liquid
C. Solid
D. None of the above
5 Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?
A. Aldol condensation
B. Reimer Tiemann reaction
C. Cannizaaor's reaction
D. Wolf-kishner reduction
6 Dehydration of allcohol gives:
A. Alkane
B. Alkene
C. Aldehyde
D. ketone
7 Aldol condensation is actually
A. Electrophilic addition of carbonation
B. Electrophilic addition of carbonium ion
C. Nucleophilic addition of carbonation
D. Nuclephilic addition of carbonium ion
8 C2H5CHO and (CH3)2CO can be distunguished by testing with
A. Phenyl hydrazine
B. Hydroxylamine
C. Fehling solution
D. Sodium bisulphate
9 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
10 The homologous series of aldehydes and ketones have general formula:
A. CnH2nO
B. CnHnO
C. CnH2n-1O
D. CnHnOn

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