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নিচের কোনটি জারণ-বিজারণ বিক্রয়া ?

2 F e (O H)_{3} (s) \to F e_{2} O_{3} (s) + 3 H_{2} O (g)

A l C l_{3} + H_{2} O \to A l (O H)_{3} (s) + 3 H C l

H_{2} S + C l_{2} \to S + 2 H C l

A g N O_{3} (a q) + N a C l (a q) \to A g C l (s) + N a N O_{3} (a q)

ANS : 3

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