A) \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.5{{H}_{2}}O\]
B) \[N{{a}_{2}}S{{O}_{4}}\]
C) \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.4{{H}_{2}}O\]
D) \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.3{{H}_{2}}O\]
Correct Answer: A
Solution :
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