A first row transition metal (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.

[JEE Main 2026, 22 Jan (Shift 1)]

Question

A first row transition metal (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.

[JEE Main 2026, 22 Jan (Shift 1)]

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