Question

Assertion: Recrystallisation of sodium carbonate gives washing soda.
Reason: Washing soda is acidic salt.     
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Answer 1

Answer:

It is used as a water softener in domestic use. When sodium carbonate reacts with water then sodium hydroxide and carbonic acid are formed. - Hence, sodium carbonate is a strong base while acid is weak, so the solution is basic, not acidic. So, the correct answer is “Option D”