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Aldehydes and Ketones - 3
1.
Aldehydes and ketones react with hydroxyl amine in the presence of acid to form ________.
a) Oximes
b) Acetal
c) Alcohols
d) CnH
2
nO
2.
Aldehydes and ketones are reduced by sodium borohydride to _____________.
a) Acetal
b) CnH
2
nO
c) Aldehyde
d) Alcohols
3.
Aldehydes combine with alcohols in the presence of H-Cl gas to form ___________.
a) Aldehyde
b) Acetal
c) Acetahyde
d) Alcohols
4.
Acetone is oxidized by acidic K
2
Cr
2
O
7
to form __________ and _____________.
a) Carboxylic acid, amide
b) Condensation reaction
c) Acetic acid, Formic acid
d) Formic acid, acetic acid
5.
All of the followings react with Fehling solution except
a) CH
3
-CH
2
.CO.CH
3
b) HCHO
c) CH
3
CH
2
CHO
d) CH
3
-CH
2
CH(CHO)CH
3
6.
When aldehydes react with Tollens reagent
a) A ketone is produced
b) Ag+ ions are produced
c) Ag+ ions are reduced
d) An alcohol is produced
7.
Which one of the followings is the strongest reducing agent.
a) C
3
H
7
OH
b) C
2
H
5
CHO
c) CH
3
COCH
3
d) C
3
H
8
8.
CH
3
COCH
3
+ HCN
®
Base Catalyst A
A + 2H
2
O + H
2
SO
4
®
B + C the identities of A, B and C are
a) (CH
3
)
2
C(OH)CN, (CH
3
)2CHCOOH & NH
4
HSO
4
b) (CH
3
)2C(OH)CN, (CH
3
)2C(OH)CONH
2
& H
2
O
c) (CH
3
)
2
C(OH)CN, (CH
3
)2CHCONH
2
& H
2
O
2
d) (CH
3
)
2
C(OH) CN, (CH
3
)
2
C(OH)COOH & NH
4
HSO
4
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