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  4. For preparing an alkane, a saturated solution of sodium or potassium salt of a carboxylic acid is subjected to

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Q. For preparing an alkane, a saturated solution of sodium or potassium salt of a carboxylic acid is subjected to

KEAMKEAM 2011Hydrocarbons

Solution:

When an concentrated aqueous solution of the sodium or potassium salt of a monocarboxylic acid is electrolyzed, an alkane is produced as shown below
$ \underset{sod.\text{ }ethanoate}{\mathop{2C{{H}_{3}}COONa}}\,+2{{H}_{2}}\text{O}\xrightarrow{Electrolysis}\underset{ethane}{\mathop{C{{H}_{3}}C{{H}_{3}}}}\, $ $ +2NaOH+{{H}_{2}}+2C{{O}_{2}} $