(a)নিম্মের সমীকরনগুলি সম্পূর্ণ কর।

(i)NaOH(aq.)+Cl₂(g)→ ? [at 70^oC]

(ii)HBr+H₂SO₄→ ?

(iii)(C₆H₅) $-\mathrm{CH}_{3}+\mathrm{CH}_{3} \mathrm{COCl} \xrightarrow{\text { Dry } \mathrm{AlCl}_{3}}$

(v) $\mathrm{CH}_{3} \mathrm{CH}_{2}OH+\mathrm{HNO}_{2} \xrightarrow[\mathrm{NaNO}_{2}]{\mathrm{HCl}}$

(iv) C₂H₅OH+C₆H₅-COOH $\stackrel{\mathrm{H}^{+}}{\rightleftharpoons}$

(i) $\mathrm{NaOH}$ (aq.) $+\mathrm{Cl}_{2}$ (g) $\stackrel{70^{\circ} \mathrm{c}}{\longrightarrow} 6 \mathrm{NaOH}(\mathrm{aq})+3 \mathrm{Cl}_{2}$ (g) $\stackrel{70^{\circ} \mathrm{C}}{\longrightarrow} 5 \mathrm{NaCl}+\mathrm{NaClO}_{3}+3 \mathrm{H}_{2} \mathrm{O}$

(ii) $\mathrm{HBr}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 2 \mathrm{HBr}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Br}_{2}+\mathrm{SO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$