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ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test MCQs With Answers
Question # 1
Formaldehyde is used to make
Choose an answer
Plastics
Medicine
Antiseptic
All of these
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Question # 2
Clemensen's reduction of ketones is carried out in
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H
2
with Pd catalyst
Glycol with KOH
LiAIH
4
in water
Zn-Hg with conc. HCl
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Question # 3
In carboxyl group the bond between C and oxygen is:
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Sigma bond
Single bond
Double Bond
Triple bond
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Question # 4
The color of ppts formed by Fehling's test is
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Brick red
Red
Yellow
Orange
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Question # 5
Which is used for the reduction of aldehydes and ketones
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NaBH
4
Pt/Pd
Ni
All of these
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Question # 6
Cannizzzaro's reaction is not given by:
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Formaldehyde
Acetaldehyde
Benzaldehyde
Trimethyl
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Question # 7
Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?
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Methanal
Ethanol
Propanone
Ethanal
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Question # 8
Ketones are reduced to
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Primary alcohol
Secondary alcohol
Tertiary alcohol
All of these
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Question # 9
Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:
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Pri-alcohol
Sec-Alcohol
Ter-alcohol
Carboxylic
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Question # 10
Reaction of Grignard's reagent eith aldehyds other formaldehyde gives: Reaction of Grignard's reagent with formaldehyde gives:
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Pri-alcohol
Sec-alcohol
Ter-alcohol
Carboxylic
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Question # 11
Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as
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Wurtz reaction
Cannizzaro reaction
Friedel Craft reaction
Claisen reaction
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Question # 12
Which of the following is hypnotic?
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Acetaldehyde
Metaldehyde
Paraldehyde
None
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Question # 13
Aldol condensation is actually
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Electrophilic addition of carbonation
Electrophilic addition of carbonium ion
Nucleophilic addition of carbonation
Nuclephilic addition of carbonium ion
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Question # 14
The addition of HCN to carbonyl compounds is an example of
Choose an answer
Nucleopihlic substituion
Electrophilic addition
Nueleophilic addition
Electrophilic substitution
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Question # 15
C
2
H
5
CHO and (CH
3
)
2
CO can be distunguished by testing with
Choose an answer
Phenyl hydrazine
Hydroxylamine
Fehling solution
Sodium bisulphate
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Question # 16
For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test
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HCHO and CH
3
CHO
CH
3
CHO and CH
3
COCH
CH
3
COCH
3
and C
6
H
5
COCH
3
CH
3
COOH and CH
3
COOCH
3
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Question # 17
Reduction of aldehydes with HI and P gives
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Primary alcohols
Secondary alcohols
Alkanes
Tertiary alcohols
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Question # 18
Acetone reacts with HCN to form a cyanohydrin. It is an example of
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Electrophilic addition
Electrophilic substitution
Nucleophilic addition
Nucleophilic substitution
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Question # 19
Hydrogenation of bezoyl chloride in presence of Pd on BaSO
4
gives
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Benzyl alcohol
Benzaldehyde
Benzoic acid
Phenol
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Question # 20
Ethanal may be converted into a three-carbon acid in a two-step process.
Which compound is the intermediate
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CH
3
CO
2
H
CH
3
CN
CH
3
CH
2
CN
CH
3
CH(OH)CN
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Question # 21
The IUPAC name fo CH
3
COCH (CH
3
)
2
is
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4-Methylisopropyl ketone
3-Methyl-2 butanone
Isopropylmethyl ketone
2 - Methyl- 2 butanone
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