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

Formula of acetone is:

Question # 2

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

Question # 3

The color of ppts formed by Benedirct's test is

Question # 4

The color of ppts formed by Fehling's test is

Question # 5

Formalin is:

Question # 6

The carbon of a carbonyl group is:

Question # 7

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

Question # 8

Acetone is oxidized with

Question # 9

Which reaction yields Bakelite?

Question # 10

Formaline Contains ______% alcohol

Question # 11

Which of the following is halo form

Question # 12

Formaldehyde is used to make

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

Cannizzaro's reaction is type of reaction:

Question # 17

Aldehydes are oxidizes are to give:

Question # 18

Which of the following in incorrect?

Question # 19

Cyanohydrin of which of the following forms lactic acid

Question # 20

Aldehydes can be distinguished from ketones by using

Question # 21

Acetaldehyde is used to make

Question # 22

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

Question # 23

Reaction of Grignard's reagent with formaldehyde gives:

Question # 24

Acetone is prepared by

Question # 25

Common names of aldehydes are given by corresponding:

Question # 26

Wolf-kishner reduction is used for the reduction of

Question # 27

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 28

Which of the following compounds does not react with NaHSO3?

Question # 29

Which of the following will have the highest boiling point?

Question # 30

Which reagent could be used to distinguish between CH3CH(OH)CH2CHO and CH3COCH2CH2OH

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Clemensen's reduction of ketones is carried out in
A. H2with Pd catalyst
B. Glycol with KOH
C. LiAIH4in water
D. Zn-Hg with conc. HCl
2 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
3 Reductive ozonolysis of benzene produces
A. Acetone
B. Maleic anhydride
C. Phthalic acid
D. Glyoxal
4 On adding sodium nitroprusside ketones give
A. Red
B. Wine red
C. White
D. Orange
5 Reduction of aldehydes with HI and P gives
A. Primary alcohols
B. Secondary alcohols
C. Alkanes
D. Tertiary alcohols
6 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
A. Chloral hydrate
B. CHCl3
C. CH3Cl
D. Chloroacetic acid
7 Self condensation of acetaldehyde in the presence of dilute alkalies gives
A. An acetal
B. An aldol
C. Mesitylene
D. Propionaldehyde
8 Which of the following compounds will not give iodoform test on treatment with I2/ NaOH?
A. Acetaldehyde
B. Acetone
C. Butane
D. 3-pentanone
9 The base used in Cannizzaro's reaction is
A. NaOH
B. KOH
C. CHI3
D. All of these
10 Ketones are reduced to
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. All of these

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