Question

Give chemical equation for :
(i) The laboratory preparation of methane from sodium acetate.
(ii) The industrial preparation of methanol from water gas.
(iii) The reaction of one mole of ethene with one mole of chlorine gas.
(iv) The preparation of ethyne from 1, 2-dibromoethane.

[4 MARKS]

Answer 1

(i) $\underset{Sodiumacetate}{C{H}_{3}COONa}+NaOH\stackrel{CaO/\Delta }{\to }N{a}_{2}C{O}_3+\underset{Methane}{C{H}_4}$

(ii) $CO+2H_2\stackrel{ZnO,{350}^{\circ }C}{\to }\underset{Methanol}{C{H}_{3}OH}$

(iii) $\underset{Ethene}{C_2{H}_4}+C{l}_2\to \underset{1,2-Dichloroethane}{C_2{H}_{4}C{l}_2}$

(iv) $\underset{1,2-Dibromoethene}{C_2{H}_{4}B{r}_2}+2KOH(alc.)\to \underset{Ethyne}{C_2{H}_2}+2KBr+2H_{2}O$