281. When aniline reacts with oil of bitter almonds $$\left( {{C_6}{H_5}CHO} \right)$$ condensation takes place and benzal derivative is formed. This is known as
A
Millon's base
B
Schiff's reagent
C
Schiff's base
D
Benedict's reagent
Answer :
Schiff's base
282. Ethyl isocyanide on hydrolysis in acidic medium generates
A
propanoic acid and ammonium salt
B
ethanoic acid and ammonium salt
C
methylamine salt and ethanoic acid
D
ethylamine salt and methanoic acid
Answer :
ethylamine salt and methanoic acid
283. Amongst the following, the most basic compound is :
A
Benzylamine
B
Aniline
C
Acetanilide
D
$$p - $$ Nitroaniline
Answer :
Benzylamine
284.
Identify $$X$$ and $$Y$$ in the reaction :
\[\xrightarrow{KCN}X\xrightarrow{\frac{{{H}_{2}}}{Pd}}Y\]
A
B
C
D
Answer :
285.
Which of the following will produce isopropyl amine –
$$\left( {\text{i}} \right){\left( {C{H_3}} \right)_2}COX$$
\[\left( \text{ii} \right)C{{H}_{3}}-C{{H}_{2}}-CHO\xrightarrow[\text{heat}]{N{{H}_{3}}}\] \[X\xrightarrow{LiAl{{H}_{4}}}\]
\[\left( \text{iii} \right){{\left( C{{H}_{3}} \right)}_{2}}CH-OH+PC{{l}_{5}}\] \[\to X\xrightarrow{N{{H}_{3}}}\]
\[\left( \text{iv} \right)C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-N{{H}_{2}}\] \[\xrightarrow{\text{heat}}\]
A
(i), (ii)
B
(ii), (iii)
C
(i), (iii)
D
(iv) only
Answer :
(i), (iii)
286. The Hinsberg test of a compound, $${C_5}{H_{14}}{N_2}$$ produces a solid that is insoluble in $$10\% \,{\text{aq}}.NaOH.$$ This solid derivative dissolves in $$10\% $$ aqueous sulphuric acid. Which of the following would best describe these facts?
A
$$N{H_2}C{H_2}C{H_2}N{\left( {C{H_3}} \right)_2}$$
B
$${\left( {C{H_3}} \right)_2}NC{H_2}C{H_2}NHC{H_3}$$
C
$$N{H_2}C{H_2}C{\left( {C{H_3}} \right)_2}C{H_2}N{H_2}$$
D
$${\left( {C{H_3}} \right)_2}NC{H_2}N{\left( {C{H_3}} \right)_2}$$
Answer :
$${\left( {C{H_3}} \right)_2}NC{H_2}C{H_2}NHC{H_3}$$
287. The amine that does not react with acetyl chloride is
A
\[C{{H}_{3}}N{{H}_{2}}\]
B
\[{{\left( C{{H}_{3}} \right)}_{2}}NH\]
C
\[{{\left( C{{H}_{3}} \right)}_{3}}N\]
D
\[\text{None of these}\]
Answer :
\[{{\left( C{{H}_{3}} \right)}_{3}}N\]
288. The gas evolved when methylamine reacts with nitrous acid is _________.
A
$$N{H_3}$$
B
$${N_2}$$
C
$${H_2}$$
D
$${C_2}{H_6}$$
Answer :
$${N_2}$$
289. The reaction of benzenesulphonyl chloride with ethylamine yields
A
$$N$$-ethylbenzenesulphonamide, insolublein alkali
B
$$N, N$$ -diethylbenzenesulphonamide, soluble in alkali
C
$$N,N$$ -diethylbenzenesulphonamide, insoluble in alkali
D
$$N$$-ethylbenzenesulphonamide, soluble inalkali
Answer :
$$N$$-ethylbenzenesulphonamide, soluble inalkali
290. Which of the following options is correct regarding the property of benzenediazonium fluoroborate?
A
It is water soluble at room temperature.
B
It is water insoluble and stable at room temperature.
C
It is a coloured solid.
D
None of these.
Answer :
It is water insoluble and stable at room temperature.