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Chemistry Class 12 Chapter 12
Aldehydes and Ketones
Test 8
1.
Which of the following reaction is not shown by ketones?
Reaction with HCN
Reaction with NAHSO
3
Reaction with fehiling solution
Reaction with 2,4 dinitrophenyl hydrazine
2.
The carbon atom of carbonyl group is?
Sp hybridized
Sp
2
hybridized
Sp
3
hybridized
Variable
3.
Which substance does not gives iodo form test?
Acetaldehyde
Ethyl alcohol
Methyl alcohol
Methyl keton
4.
Formalin is formed by mixing formaldehyde in water?
10%
20%
40%
60%
5.
Which aldehyde shows rapid reaction with sodium nitroprusside?
Formaldehyde
Acetaldehyde
Benzaldehyde
Acetone
6.
Acetone reacts with HCN to form a cyanohydrins, it is an example of?
Nucleophilic substation
Electrophilic substitution
Nucleophilic addition
Electrophilic addition
7.
Which of the following compound will react with Tollen’s reagent?
CH
3-
CHO
CH
3-
CO-CH
3
CH
3-
COOH
All of these
8.
Which of the following reaction are associated with aldehydes and ketones?
Nucleophilic addition
Polymerization
Oxidation
All of these
9.
Cannizzaro’s reaction is not given by?
Formaldehyde
Acetaldehyde
Benzaldehyde
None of these
10.
Which reagents reacts with both aldehyde and ketone?
Grignard’s reagent
Tollen’s reagent
Fehiling solution
Benedicts’ reagent
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