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UP POLICE SIUP POLICE SI Hard Mock Set 2Hard GK

UP POLICE SI Mock Test Set 2, Q43: Identify the correct answer for chemical formula of washing soda.

A. NaCl
B. Na2CO3·10H2O
C. NaHCO3
D. CaCO3
Correct Answer: B. Na2CO3·10H2O
Explanation: Washing soda is sodium carbonate decahydrate. Category: UP POLICE SI. Set: 2.
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