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Online Tests
ECAT Chemistry Chapter 23 Aldehydes and Ketones Online Test MCQs With Answers
Question # 1
Which of the following will have the highest boiling point
Choose an answer
Methanol
Ethanol
Propanal
2-hexanone
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Question # 2
Aldol condensation is actually
Choose an answer
Electrophilic addition of carbonation
Electrophilic addition of carbonium ion
Nucleophilic addition of carbonation
Nuclephilic addition of carbonium ion
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Question # 3
Common names of aldehydes are given by corresponding:
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Ketone
Alcohol
Carboxylic acid
ester
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Question # 4
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 # 5
Choose an answer
Treatment with HCN followed by acid hydrolysis
Oxidation of acetaldehyde followed by basic hydrolysis
Treatment with HCN followed by reduction
Treatment with HCN followed by oxidation
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Question # 6
Choose an answer
Br
2(aq)
2, 4-dinitrophenylhydrazine
NaBH
Tollen's reagent
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Question # 7
Aldehydes which do not have
α
-hydrogen undergo
Choose an answer
Aldol combination
Cannizzaro's reaction
Substitution
Elimination
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Question # 8
In formadaldehyde and KOH are heated then we get
Choose an answer
Acetylene
Methane
Methyl alcohol
Ethyl formate
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Question # 9
Formalin is:
Choose an answer
10% solution of formaldehyde in water
20% solution of formaldehyde in water
40% solution of formaldehyde in water
60% solution of formaldehyde in water
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Question # 10
Which of the following react with NaOH to produce an acid and an alcohol?
Choose an answer
NCHO
CH
3
COOH
CH
3
CH
2
COOH
C
6
H
5
COOH
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Question # 11
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 # 12
Choose an answer
2-chlorobutanal
alfa-chlorobutanal
2-chlorobutyraldehyde
alfa- chlorobutyraldehyde
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Question # 13
Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre
Choose an answer
Ch
3
CHO
CH
3
CH
2
COCH
2
CH
3
CH
3
CO
2
CH
3
HCHO
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Question # 14
Reaction of Grignard's reagent with formaldehyde gives:
Choose an answer
pri-alcohol
sec-alcohol
ter-alcohol
carboxylic
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Question # 15
During the mechanism of aldol condensation a/an ______ is formed
Choose an answer
Oxide
Alkali
Alkoxide ion
None of these
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Question # 16
Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?
Choose an answer
Methanal
Ethanol
Propanone
Ethanal
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Question # 17
The color of ppts formed by Benedirct's test is
Choose an answer
Brick red
Wine red
Yellow
Orange
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Question # 18
Carboxyl compounds have functional group:
Choose an answer
R-C-X
R-CH=O
RCOR
All
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Question # 19
Clemensen's reduction of ketones is carried out in
Choose an answer
H
2
with Pd catalyst
Glycol with KOH
LiAIH
4
in water
Zn-Hg with conc. HCl
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Question # 20
Which one of the following is a product of the reaction between C
6
H
5
CH
2
OH and CH
3
COCI
Choose an answer
C
6
H
5
OCOCH
3
C
6
H
5
CH
2
CI
C
6
H
5
CH
2
OCOCH
3
C
6
H
5
CH
2
COCI
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Question # 21
Cannizzaro's reaction in not given by
Choose an answer
Formaldehyde
Acetaldehyde
Benzaldyhyde
Trimethylacetaldehyde
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Question # 22
Choose an answer
Q and R Q and R
R only Q and R
Q and R R only
Q only R only
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Question # 23
Reductive ozonolysis of benzene produces
Choose an answer
Acetone
Maleic anhydride
Phthalic acid
Glyoxal
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Question # 24
Aldehydes are oxidizes are to give:
Choose an answer
Primary alcohol
Sec-alcohol
Ter-alcohol
Carboxylic acid
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Question # 25
The color of ppts formed by Fehling's test is
Choose an answer
Brick red
Red
Yellow
Orange
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Question # 26
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 # 27
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 # 28
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 # 29
Which of the following compounds will react with reagent ?
Choose an answer
CH
3
CO H
CH
3
CO CH
3
CH
3 COOH
CH
3
CO CH
2
CH
3
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Question # 30
Formula of acetone is:
Choose an answer
HCHO
CH
3
CHO
CH
3
OCH
3
CH
3
OC
2
H
5
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Question # 31
Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?
Choose an answer
Cyclohexanol
Cyclohex-2-enol
Cyclohexanone
Benzene
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