Which of the following statements is true in terms of uses of Washing Soda ?
1. glass, soap and paper industries.
2. manufacture of sodium compounds such as borax.
3. cleaning agent for domestic purposes.
4. removing permanent hardness of water.
5. storage of water

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1 & 2

1, 2, 3 & 4

2, 4 & 5

1, 2, 4 & 5

answer is B.

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Detailed Solution

Sodium carbonate decahydrate (Na₂CO₃.10H₂O) is also referred to as washing soda.
Washing soda is used to produce glasses, papers and soaps.
It helps to remove the permanent hardness of the water.
It is used as a cleaning medium for household purposes.
It is used to manufacture sodium compounds such as borate.