Pure methane can be produced by:

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(C) Pure methane $(CH_4)$ is produced by the decarboxylation of sodium acetate with sodalime $(NaOH + CaO)$.The reaction is: $CH_3COONa + NaOH \xright

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Sodalime decarboxylation

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(C) Pure methane $(CH_4)$ is produced by the decarboxylation of sodium acetate with sodalime $(NaOH + CaO)$.The reaction is: $CH_3COONa + NaOH \xrightarrow{CaO, \Delta} CH_4 + Na_2CO_3$.Other methods like Wurtz reaction are used for higher alkanes (even number of carbon atoms),and Kolbe's electrolysis of sodium acetate produces ethane.

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