What will be the colour of litmus in an aqueous solution of ammonium chloride salt?

What is meant by 'hydrated' and 'anhydrous' salts? Explain with examples.

Write the names, formulae and colours of any two hydrated salts.

Describe how washing soda is produced starting from sodium chloride(common salt). Write equations of all the reactions involved.

State whether an aqueous solution of washing soda is acidic or alkaline? Give reason for your answer.