1
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Hinsberg's reagent is

A
$$\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}$$/pyridine
B
$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{SO}_2 \mathrm{Cl}$$
C
$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{SO}_2 \mathrm{NH}_2$$
D
$$\mathrm{CH}_3 \mathrm{COCl} /$$pyridine
2
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Which of the following is least soluble in water at $$298 \mathrm{~K}$$ ?

A
$$\mathrm{CH}_3 \mathrm{NH}_2$$
B
$$\left(\mathrm{CH}_3\right)_3 \mathrm{N}$$
C
$$\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$$
D
$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$$
3
KCET 2019
MCQ (Single Correct Answer)
+1
-0

If aniline is treated with $$1: 1$$ mixture of conc. $$\mathrm{HNO}_3$$ and conc. $$\mathrm{H}_2 \mathrm{SO}_4$$, p-nitroaniline and $$m$$-nitroaniline are formed nearly in equal amounts. This is due to

A
$$m$$-directing property of $$-\mathrm{NH}_2$$ group
B
protonation of $$-\mathrm{NH}_2$$ which causes deactivation of benzene ring
C
$$m$$ and $$p$$ directing property of $$-\mathrm{NH}_2$$ group
D
isomerisation of some $$p$$-nitroaniline into $$m$$-nitroaniline
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