See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

 2 2 7 2 4 2 2 2 4 2 K Cr O 4KCl 3H SO 2CrO Cl 3K SO 3H O A      2 2 2 4 2 CrO Cl 4NaOH Na CrO 2NaCl 2H O     Number of atoms in 2 2 CrO Cl 2  .