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Delhi Police Constable Exam Model Paper 8
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© examsnet.com
Question : 49
Total: 100
Washing soda is the common name for
Sodium carbonate
Calcium bircarbonate
Sodium bicarbonate
Calcium carbonate
Validate
Solution:
The correct answer is
Sodium carbonate.
Washing soda is the common name of sodium carbonate
. Hence option 1 is correct
It is also known as soda ash and soda crystals.
Its chemical formula is Na
2
CO
3
Washing soda is a chemical compound that can be used to remove stubborn stains from laundry.
The sodium carbonate "softens" water helping other cleaning agents lift dirt particles from the fabrics and suspend them in the wash water.
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