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प्रश्न
Why is common salt (sodium chloride) added during the preparation of soap?
लघु उत्तर
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उत्तर
Common salt (sodium hydroxide) is added during the preparation of soap to separate the soap from the aqueous solution. On adding common salt, the solubility of the soap present in the solution decreases. This allows the soap to be taken out of the solution in its solid form.
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