Identify the incorrect pair : I. Washing soda - Na 2 CO 3 II. Bleaching powder - CaO III. Plaster of paris - CaSO 4 , 1/2 H 2 O IV. Baking soda - NaHCO 3

TNPSC Group 4 General Knowledge 2018 Paper

Question : 48 of 100

Marks: +1, -0

Identify the incorrect pair :
I. Washing soda - Na₂CO₃
II. Bleaching powder - CaO
III. Plaster of paris - CaSO₄, 1/2 H₂O
IV. Baking soda - NaHCO₃

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