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UP POLICE SIUP POLICE SI Hard Mock Set 3Hard GK

UP POLICE SI Mock Test Set 3, Q43: Identify the correct answer for chemical formula of washing soda.

A. CaCO3
B. NaCl
C. Na2CO3·10H2O
D. NaHCO3
Correct Answer: C. Na2CO3·10H2O
Explanation: Washing soda is sodium carbonate decahydrate. Category: UP POLICE SI. Set: 3.
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