See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

  3 6 K Fe CN :     3 5 Fe 3d  g e 2g t P 1  2 6 Fe 3d  e 2t Q 3    2 4 FeCl :  3 5 Fe 3d  2g t g e R 3    2 3 6 Fe H O Cl :     2 6 Fe 3d  2g t g e S 2    4 6 FeF :  P Q R S 1 3 3 2 9         