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UP Police Constable Exam Model Paper 4
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© examsnet.com
Question : 11
Total: 150
Which one of the following compounds is used as washing soda?
Sodium Sulphate
Sodium Carbonate
Calcium Sulphate
Calcium Carbonate
Validate
Solution:
The correct option is 2 i.e.
Sodium Carbonate
Sodium Carbonate is also known as washing soda it is a
salt of carbonic acid.
Sodium carbonate can be manufactured by
Solvay's process.
It is used for
treating hard waterandindustrial detergent mixtures.
The
aqueous solution of sodium carbonate is alkaline.
Calcium Sulphate exists in the forms of white solids and is not soluble in water.
Plaster of Paris and Gypsum are its hydrates.
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