A) 2
B) 3
C) 1
D) zero
Correct Answer: A
Solution :
[a] \[4FeS+7{{O}_{2}}\to 2F{{e}_{2}}{{O}_{3}}+4S{{O}_{2}}\] \[S{{O}_{2}}+{{H}_{2}}O\to {{H}_{2}}S{{O}_{3}}\rightleftharpoons 2{{H}^{+}}+SO_{3}^{2-}\] It is dibasic
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