How is
(a) Methane prepared in the laboratory

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Solution

Laboratory preparation of methane: When the mixture of sodium ethanoate and soda-lime is taken in a hard glass test tube and heated. The gas that evolved is methane. It is collected by the downward displacement of water.
${C H}_{3} C O O N a + N a O H C a O ⟶ 300^{\circ} C {N a}_{2} {C O}_{3} + {C H}_{4} ↑$

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