See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Mole of complex = 1 266.5 1 mole of complex produce 2 mole of HCl     2 2 2 2 5 5 Cr H O Cl Cl Cr H O Cl 2Cl             Mole of HCl = 1 2 266.5  3 HCl 2 N