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TNPSC Group 4 · 2019

133.  Which of the following are wrong?
I. Na₂CO₃ is used in softening hard water
II. NaHCO₃ is used for bleaching cotton and linen in textile industry
III. CaSO₄ ½ H₂O is used for plastering fractured bones
IV. CaOCl₂ is used in making of baking powder

Answer: B.   II and IV
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