TNPSC Group 4 General Knowledge 2019 Paper
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Question : 33 of 100
Marks:
+1,
-0
Which of the following are wrong?
I.Na2CO3 is used in softening hard water
II.NaHCO3 is used for bleaching cotton and linen in the textile industry
III.CaSO4 H2O is used for plastering fractured bones
IV.CaOCl2 is used in the making baking powder
I.Na2CO3 is used in softening hard water
II.NaHCO3 is used for bleaching cotton and linen in the textile industry
III.CaSO4 H2O is used for plastering fractured bones
IV.CaOCl2 is used in the making baking powder
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