JEE Main 22 Jan 2026 Shift 1 Paper Solved Paper

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.