is added to remove the hardness of water.

{NaHCO}_{3}

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{Na}_{2} {CO}_{3} .10 H_{2} O

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{CaSO}_{4} .2 H_{2} O

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{CaOCl}_{2}

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Solution

The correct option is B ${Na}_{2} {CO}_{3} .10 H_{2} O$
Adding ${Na}_{2} {CO}_{3} .10 H_{2} O$ (washing soda) to hard water softens it by removing the calcium and magnesium ions. It is extensively used in laundries.

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Similar questions

Q. Which of the following is added to remove permanent hardness of water?

Statement-1 : In clarks process excess of lime is not added to water sample to remove temporary hardness.
Statement-2 : Addition of excess of milk of lime causes permanent hardness.

When washing soda is added to remove the permanent hardness of water it converts sulphates and chlorides into which of the following insoluble compound-

Q. Temporary hardness of water can be removed by adding:

Permanent hardness of water can be removed by adding ____.

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is added to remove the hardness of water.

The correct option is B Na2CO3.10H2OAdding Na2CO3.10H2O (washing soda) to hard water softens it by removing the calcium and magnesium ions. It is extensively used in laundries.

The correct option is B ${Na}_{2} {CO}_{3} .10 H_{2} O$
Adding ${Na}_{2} {CO}_{3} .10 H_{2} O$ (washing soda) to hard water softens it by removing the calcium and magnesium ions. It is extensively used in laundries.