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মোরের লবন কোনটি?

F e S O_{4} . 7 H_{2} O

F e S O_{4} . (N H_{4})_{2} S O_{4} . 6 H_{2} O

Z n S O_{4} . 7 H_{2} O

M g S O_{4} . 5 H_{2} O

ANS : 2

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