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Chemistry Class 12 Chapter 12
Aldehydes and Ketones
Test 6
1.
Aldehydes are first oxidation of?
Tertiary alcohol
Primary alcohol
Dihydric alcohol
Secondary alcohol
2.
Which alkene on reductive ozonolysis gives acetaldehyde as a product?
1-butene
Isobutylene
2-butene
Propene
3.
Which ketone will yield tertiary butyl alkyl alcohol on treatment with CH
3
MgBr following by hydrolysis?
2-butanone
2-pentanone
3-pentanone
Acetone
4.
Fehling solution is?
None of these
Copper sulphate and Rochells salt+ NaOH
Acidified KMnO
4
Amonical cuprous chloride solution
5.
The least reactivity of aldehyde towards nucleophilic attack among the following is?
CH
3
CHO
CH
3
CH
2
CHO
HCHO
C
6
H
5
CHO
6.
Both aldehydes and ketones can be represented by the general formula?
C
n
H
2n+1
O
C
n
H
2n+2
O
C
n
H
2n+2
O
2
C
n
H
2n
O
7.
Which is the correct order of increasing boiling point in the following series?
Methanal<ethanol<propanal<acetone
Ethanal<acetone<propanal<methanal
Ethanol>acetone>proponal>methanal
Acetones>ethanol>methanal>propanal
8.
Which of the following reagent can be provide distinction between propionaldehyde and acetaldehyde?
Tollen’s reagent
Sodium hypochlorite
Fehiling solution
Schiff’s reagent
9.
The oxidation product of ethanol is treated first with calcium and then subjected to distillation under dry condition, the final product is?
Ethanol
Methanol
Acetic acid
Acetone
10.
Which test is only shown by ketones?
Benedict’s solution test
Fehiling solution test
Tollen’s test
Sodium nitroprosside test
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