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

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

Question # 2

Wolf-kishner reduction is used for the reduction of

Question # 3

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

Question # 4

Which of the following compounds gives a ketone with Grignard's reagent?

Question # 5

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

Question # 6

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

Question # 7

On adding sodium nitroprusside ketones give

Question # 8

Which compound would undergo nucleophilic addition

Question # 9

Aldehydes are oxidizes are to give:

Question # 10

On heating acetaldehyde with ammonical silver nitrate solution, we get

Question # 11

Formalin is an aqueous solution of

Question # 12

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

Question # 13

Formaldehyde is used to make

Question # 14

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH4or LiAIH4?

Question # 15

Which of the following does not react with phenyl hydrazine?

Question # 16

Isopropyl alcohol on oxidation forms

Question # 17

The colour of ppts formed by Fehling's test is

Question # 18

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

Question # 19

Aldehydes can be distinguished from ketones by

Question # 20

Iodoform test is given by:

Question # 21

Which of the following compounds does not react with NaHSO3?

Question # 22

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

Question # 23

Which of the following compounds will react with reagent ?

Question # 24

Common names of aldehydes are given by corresponding:

Question # 25

Which of the following is halo form

Question # 26

The color of ppts formed by Benedirct's test is

Question # 27

Aldehydes are produce in atmosphere by

Question # 28

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

Question # 29

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

Question # 30

Reduction of aldehydes with HI and P gives

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?
A. Methanal
B. Ethanol
C. Propanone
D. Ethanal
2 Which of the following is hypnotic?
A. Acetaldehyde
B. Metaldehyde
C. Paraldehyde
D. None
3 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
4 Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent
A. Butan-1-ol
B. Butan-2-ol
C. 2-methylpropan-1-ol
D. 2-methylpropan-2-ol
5 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
6 Which of the following does not react with phenyl hydrazine?
A. Ethanol
B. Ethanal
C. Acetone
D. Acetophenone
7 During the mechanism of aldol condensation a/an ______ is formed
A. Oxide
B. Alkali
C. Alkoxide ion
D. None of these
8 At room temperature formaldehyde is
A. Gas
B. Liquid
C. Solid
D. None of the above
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 Chromic acid used to oxidize
A. Aldehyde
B. Ketone
C. Both a and b
D. None of these

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