A) Washing soda
B) Soda lime
C) Sodium chloride
D) Sodium bicarbonate
Correct Answer: B
Solution :
Permanent hardness can be removed by the addition of washing soda \[(N{{a}_{2}}C{{O}_{3}}.10{{H}_{2}}O),\]addition of so- dium polymetaphosphate [calgon \[{{(NaP{{O}_{3}})}_{n}}\]by ion exchange method]. Hence, the correct option is (b).You need to login to perform this action.
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