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ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test MCQs With Answers
Question # 1
The IUPAC name fo CH
3
COCH (CH
3
)
2
is
Choose an answer
4-Methylisopropyl ketone
3-Methyl-2 butanone
Isopropylmethyl ketone
2 - Methyl- 2 butanone
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Question # 2
Give IUPAC name fo Acetone
Choose an answer
Ethanal
Propanone
Butanone
Propanal
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Question # 3
Which of the following in incorrect?
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FelCl
3
is used in the detection of phenols
Fehling solution is used in the detection of glucose
Tollen's reagent is used in detection of unsaturation
NaHSO
3
is used in the detection of carbonyl compounds
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Question # 4
Which of the following does not turn Schiff's reagent to pink?
Choose an answer
Formaldehyde
Bezaldehyde
Aceton
Methyl chloride
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Question # 5
Which one of the following reagents will distinguish between C
6
H
5
CHO and C
6
H
5
COCH
3
Choose an answer
Aqueous bromine
Phosphorus pentachloride
2, 4 DNPH
Tollen's reagent
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Question # 6
The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product
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CH
3
CH(OH)COOH
CH
3
CH
2
CH(OH)COOH
(CH
3
)
2
C(OH)COOH
CH
3
CH
2
CH
2
COOH
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Question # 7
Dehydration of allcohol gives:
Choose an answer
Alkane
Alkene
Aldehyde
ketone
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Question # 8
Benzophenone can be converted into benzene using
Choose an answer
Fused alkali
Anhydrous AlCl
3
Sodium amalgam in water
Acidfied dichromate
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Question # 9
Wolf-kishner reduction is used for the reduction of
Choose an answer
Nitro compounds
Carboxylic acids
Carbonyl compounds
Olefins
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Question # 10
Aldehydes can be distinguished from ketones by
Choose an answer
2,4-DNPH test
NaHSO
3
test
N
2
H
4
test
Tollen's test
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Question # 11
What is formed when propanone is refluxed with an anhydrous solution of NaBH
4
Choose an answer
Propanal
Propan-1-ol
Propan-2-ol
Propane
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Question # 12
An organic compound 'A' has the molecular formula C
3
H
6
O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C
9
H
14
O. A and B, respectively are
Choose an answer
Propanal and mesitylene
Propanone and mesityl oxide
Propanone and 2, 6-dimethyl-2,5-heptadien-4-one
Propanone and mesitylene oxide
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Question # 13
Chromyl chloride and toluene react to produce
Choose an answer
p-chlorotoluene
Benzaldehyde
Benzyl chloride
Bezoic acid
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Question # 14
Formaldehyde is used to make
Choose an answer
Plastics
Medicine
Antiseptic
All of these
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Question # 15
Cyanohydrin of which of the following forms lactic acid
Choose an answer
HCHO
CH
3
COCH
3
CH
3
CHO
CH
3
CH
2
CH
2
CHO
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Question # 16
Which of the following is halo form
Choose an answer
CHBr
3
CHCI
3
CHI
3
All of these
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Question # 17
Acetone is prepared by
Choose an answer
Oxidation of n-propyl alcohol
Oxidation of acetaldehyde
Pyrolysis of calcium acetate
Pyrolysis of calcium acetate as well as acetic acid
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Question # 18
Reduction of aldehydes with HI and P gives
Choose an answer
Primary alcohols
Secondary alcohols
Alkanes
Tertiary alcohols
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Question # 19
Chromic acid used to oxidize
Choose an answer
Aldehyde
Ketone
Both a and b
None of these
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Question # 20
Which of the following reagent will react with both aldehyde and ketones?
Choose an answer
Grinard's reagent
Tollen's reagent
Fehling's reagent
Benedict's reagent
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Question # 21
Reaction of Grignard's reagent with formaldehyde gives:
Choose an answer
pri-alcohol
sec-alcohol
ter-alcohol
carboxylic
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Question # 22
Ketons are prepared by the oxidation of
Choose an answer
Primary alcohol
Secondary alcohol
Tertiary alcohol
None of these
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Question # 23
Acetone reacts with HCN to form a cyanohydrin. It is an example of
Choose an answer
Electrophilic addition
Electrophilic substitution
Nucleophilic addition
Nucleophilic substitution
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Question # 24
In Tolten's best, the end product is ______ formed
Choose an answer
White ppts
Red ppts
Yellow ppts
Silver mirror
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Question # 25
Which of the following is hypnotic?
Choose an answer
Acetaldehyde
Metaldehyde
Paraldehyde
None
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Question # 26
The color of ppts formed by Benedirct's test is
Choose an answer
Brick red
Wine red
Yellow
Orange
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Question # 27
Which is not true about acetophenone?
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Reacts to form 2,4-dintrophenyl hydrazine
Reacts with Tollen's reagent to form silver mirror
Reacts with I
2
/NaOH to form iodoform
On oxidation with alkaline KMnO
4
followed by hydrolysis gives benzoic acid
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Question # 28
Choose an answer
With H
2
/Ni CH
3
(CH
2
)
5
CH
2
OH
With H
2
/Ni CH
3
(CH
2
)
5
CH
3
With NaBH
4
CH
3
(CH
2
)
5
CH
2
OH
With NaBH
4
CH
3
(CH
2
)
5
CHO
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Question # 29
Condensation of aldeydes with
α-hydrogen gives:
Choose an answer
Acetal
Ketal
Aldol
Cannizzaro product
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Question # 30
Which reagent will distinguish a ketone from an aldehyde
Choose an answer
Br
2
2, 4-dinitrophenylhydrazine
NaBH
4
Tollen's reagent
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Question # 31
Ketones are prepared by the oxidation of
Choose an answer
Primary alcohol
Secondary alcohol
Tertiary alcohol
None of these
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