271. Which of the following compounds is an enamine ?
A
B
C
D
Answer :
272.
The correct order of basicities of the following compounds is
A
2 > 1 > 3 > 4
B
1 > 3 > 2 > 4
C
3 > 1 > 2 > 4
D
1 > 2 > 3 > 4
Answer :
1 > 3 > 2 > 4
the electron availability
273.
Which of the following amines can be resolved into two enantiomers ?
A
I, IV
B
I, II
C
I, III, IV
D
III, IV
Answer :
III, IV
274.
Among the following,
$$\eqalign{
& \left( {\text{i}} \right)C{H_3}N{H_2} \cr
& \left( {{\text{ii}}} \right){\left( {C{H_3}} \right)_2}NH \cr
& \left( {{\text{iii}}} \right){\left( {C{H_3}} \right)_3}N \cr
& \left( {{\text{iv}}} \right){C_6}{H_5}N{H_2} \cr} $$
Which will give the positive carbylamine test?
A
(i) and (ii) only
B
(i) and (iv) only
C
(ii) and (iv) only
D
(ii) and (iii) only
Answer :
(i) and (iv) only
275. Electrophilic substitution of aniline with brominewater at room temperature gives
A
2-bromoaniline
B
3-bromoaniline
C
2, 4, 6-tribromoaniline
D
3, 5, 6-tribromoaniline
Answer :
2, 4, 6-tribromoaniline
276.
Match the column I with column II and mark the appropriate choice.
A
A - iv, B - iii, C - ii, D - i
B
A - iii, B - iv, C - i, D - ii
C
A - ii, B - iii, C - iv, D - i
D
A - i, B - ii, C - iii, D - iv
Answer :
A - iv, B - iii, C - ii, D - i
277.
The end product $$Z$$ of the reaction :
Ethyl amine \[\xrightarrow{HN{{O}_{2}}}X\xrightarrow{PC{{l}_{5}}}Y\xrightarrow{KCN}Z\] is
A
propanenitrile
B
triethylamine
C
diethylamine
D
propylamine
Answer :
propanenitrile
278. For carbylamine reaction, we need hot $$alc.$$ $$KOH$$ and
A
any primary amine and chloroform
B
chloroform and silver powder
C
a primary amine and an alkyl halide
D
a mono alkyl amine and trichloromethane
Answer :
any primary amine and chloroform
279. The decomposition of organic compounds, in the presence of oxygen and without the development of odoriferous substances, is called
A
decay
B
$${N_2}$$ - fixation
C
nitrification
D
denitrification
Answer :
decay
280.
Match the column I with column II and mark the appropriate choice.
| Column I | Column II | ||
|---|---|---|---|
| a. | Reaction of benzenediazonium chloride with cuprous salts dissolved in the halogen acid | 1. | Sandmeyer reaction |
| b. | Reacion of benzenediazonium chloride with halogen acid in the presence of copper powder | 2. | Gatterman reaction |
| c. | Reaction of amines with chloroform | 3. | Hinsberg's reaction |
| d. | Reaction of amines with benzenesulphonyl chloride | 4. | Carbylamine reaction |
A
a - 1, b - 2, c - 3, d - 4
B
a - 4, b - 3, c - 2, d - 1
C
a - 3, b - 4, c - 1, d - 2
D
a - 1, b - 2, c - 4, d - 3
Answer :
a - 1, b - 2, c - 4, d - 3