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Aldehydes and Ketones - 1
1.
Aldehydes and ketones are represented by general formula _____________.
a) CnH
2
nO
b) NH
2
NHCONH
2
c) PdCl
2
,CuCl
2
d) CH
3
CH(OH)-COOH
2.
In common system CH
3
CH
2
CH
2
CHO is called ______________.
a) Carboxylic acid
b) Butyraldehyde
c) Pentanal (Valeraldehyde)
d) Methyl ketone
3.
Formalin is a mixture of ______________ and _______________ in water.
a) CH
3
CH(OH)-COOH
b) NH
2
NHCONH
2
c) Formic acid, acetic acid
d) 40% formaldehyde, 8% methylacohol and 52% water
4.
The aldehyde obtained by the oxidation of n-pentyl alcohol with acidified sodium dichromate solution is ________________.
a) Paraldehyde
b) Pentanal (Valeraldehyde)
c) Aldehyde
d) Cyanohydrin
5.
Acetaldehyde is obtained by the dry distillation of a mixture of calcium salts of ________ and ___________.
a) 40% formaldehyde, 8% methylacohol and 52%
b) Metaformaldehyde, Paraldehyde
c) Acetahyde, Methyl ketone
d) Formic acid, acetic acid
6.
Industrially acetaldehyde is obtained by air oxidation of ethylene using catalyst __________ and promoter ___________ .
a) CnH
2
nO
b) PdCl
2
,CuCl
2
c) CH
3
CH(OH)-COOH
d) NH
2
NHCONH
2
7.
Hydrogen cyanide adds to aldehyde and ketones to form _______________.
a) Carboxylic acid
b) Condensation reaction
c) Cannizzaros reaction
d) Cyanohydrin
8.
The cyano group is hydrolyzed by aqueous acid into a _________ through ______________.
a) Formic acid, acetic acid
b) Carboxylic acid, amide
c) Acetahyde, Methyl ketone
d) Condensation reaction
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