Question

The crystal of a compound A on

keeping in air get converted into a

white powder. It’s solution in water

gives blue colour with red litmus. It is

used to remove permanent hardness

from water.

(A) Identify the substance. Write

chemical formula for its crystalline

form.

(B) Identify the nature of the

substance.

(C) Write two more uses of the

substance.​

Answer 1

Answer:

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