Question

Which of following compounds does not dissolve in conc. $H_{2}S{O}_4$ even on warming?

• A. Ethylene
• B. Benzene
• C. Hexane
• D. Aniline

Answer 1

The correct option is C Hexane

(c) ${\mathrm{CH}}_2={\mathrm{CH}}_2+H_2{\mathrm{SO}}_4\to {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{OSO}}_{3}H{C}_6{H}_6+H_2{\mathrm{SO}}_4\to C_6{H}_5{\mathrm{SO}}_{3}H+H_{2}O{C}_6{H}_{14}+H_2{\mathrm{SO}}_4\to \mathrm{No}\mathrm{reaction}{C}_6{H}_5{\mathrm{NH}}_2+H_2{\mathrm{SO}}_4\to C_6{H}_5\stackrel{}{\stackrel{+}{N}{H}_3{\mathrm{HSO}}_4^{-}}$ only hexane does not dissolve in conc. $H_2{\mathrm{SO}}_4$ even on warming.