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Question

নিচের কোন আয়নটির সিক্ত পরীক্ষায়

F e S O_{4} . N O

যৌগটি তৈরি হয়?

F e^{2 +}

S {O_{4}}^{2 -}

N {O^{-}}_{3}

F e^{3 +}

ANS : 3

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