See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

  2 2 4 4 4 2 4 4 2 FeSO . NH SO .6H O Fe 2NH 2SO       x = 5        4 2 4 2 2CuSO 4KCN 2CuCN K SO CN         3 4 3KCN CuCN K Cu CN     3 3 4 4 K Cu CN 3K Cu CN             y = 4