A first row transition metla (M) does not liberate H2 gas from dilute HCl. 1 mol of aqueous solution of MSO4 is treated with excess of aqueous KCN and then H2S(g) is passed through the solution. The a

Question

A first row transition metla (M) does not liberate H2 gas from dilute HCl. 1 mol of aqueous solution of MSO4 is treated with excess of aqueous KCN and then H2S(g) is passed through the solution. The amount of MS (metal sulphide) formed from the above reaction is _______ mol.

(A) 2
(B) 1
(C) 3
(D) 0

Prashant Kotian · Accepted Answer

Correct answer: D. dil.HCl Cu no reaction  KCN 4 perfect complex CuSO [Cu(CN) ]   H S  no sulphide ppt

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