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ChemistryJEE Main 22 Jan 2026, Shift 1·Q8·MCQ·Moderate

Coordination Compounds · Cyanide complex stability

A first row transition metal (M) does not liberate HX2\ce{H2} gas from dilute HCl. 1 mol of aqueous solution of MSOX4\ce{MSO4} is treated with excess of aqueous KCN and then HX2S(g)\ce{H2S(g)} is passed through the solution. The amount of MS (metal sulphide) formed from the above reaction is mol.
  1. (1)2
  2. (2)1
  3. (3)3
  4. (4)0
We corrected a printing error in the original paper

Source printed “A first row transition metla (M)”.

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