Give chemical equation for:
(a) The laboratory preparation of methane from sodium acetate.
(b) The reaction of one mole of ethene with one mole of chlorine gas.
(c) The preparation of ethyne from 1, 2-dibromoethane.

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Solution

(a) $\underset{Sodium acetate}{{CH}_{3} COONa} + NaOH \to_{CaO}^{∆} \underset{Methane}{{CH}_{4}} + {Na}_{2} {CO}_{3}$

(b) $\underset{Ethene}{C_{2} H_{4}} + {Cl}_{2} \overset{{CCl}_{4}}{\to} \underset{1, 2 - Dichloroethane}{C_{2} H_{4} {Cl}_{2}}$

(c) $\underset{1, 2 - Dibromoethane}{C_{2} H_{4} {Br}_{2}} + \underset{alcoholic}{2 KOH} \to \underset{Ethyne}{C_{2} H_{2}} + 2 KBr + 2 H_{2} O$

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Give the method of preparation of ethyne from 1, 2-dibromoethane.

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