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  4. Causticization process is used for the preparation of

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Q. Causticization process is used for the preparation of

The s-Block Elements

Solution:

Causticizing process (Gossage process) is an old process and involves heating of $10\%$ solution of $NaCO_{3}$ with a little excess of milk of lime $Ca(OH)_{2}$
$Na_{2}CO_{3}+Ca(OH)_{2} \to CaCO_{3} ↓ +2NaOH$