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Chemistry Class 12 Chapter12
Aldehydes and Ketones
Test 10
1.
Nucleophilic addition reactions are catalyzed?
Acid
Base
Both
None
2.
Acetaldehyde cyano hydrine on acid hydrolysis yields?
Lactic acid
Tartaric acid
Propoinic acid
Valeric acid
3.
Which of the following does not show aldol condensation reaction?
HCHO
C
6
H
5
CHO
CI
3
CHO
All
4.
For aldol condensation necessary condition?
Alpha-C
Alpha-H
Basic medium
All
5.
Aldehydes are reduced to?
P
o
alcohol
S
o
alcohol
T
o
alcohol
Not possible
6.
In aldehyde the carbonyl group is bonded to?
1 hydrogen
1 carbon
At least 1 hydrogen
1 hydrogen and 1 carbon
7.
Aldehyde group is mostly present in?
Stone
Acid
Base
Sugar
8.
Acetaldehyde is prepared by the oxidation of?
Ethyl alcohol
Methyl alcohol
Propyl alcohol
None of these
9.
When aldehydes are prepared on industry scale the catalyst used is?
Molybdenum oxide
Iron oxide
Silver
All of these can be used
10.
Reactivity of carbonyl group is due to?
Sp
2
hybridization
Oxygen atom
Carbon atom
C=O polarity
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