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.

Coordination Compounds: JEE Main 2026 Chemistry question

JEE Main 2026 · 22 Jan, Morning shift · Q59

JEE Main 202622 Jan, Morning shiftChemistryMediumCoordination Compounds198× since 2002

A first row transition metal (M) does not liberate

\mathrm{H_2}

gas from dilute HCl. 1 mol of aqueous solution of

\mathrm{MSO_4}

is treated with excess of aqueous KCN and then

\mathrm{H_2S(g)}

is passed through the solution. The amount of MS (metal sulphide) formed from the above reaction is ______ mol.

JEE Main 2026 Coordination Compounds Question with Solution (22 Jan Morning shift, Q59) | JEE Arc