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TNPSC Group 4 General Knowledge 2018 Paper
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Question : 48
Total: 100
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
I
II
III
IV
Validate
Solution:
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