See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

(for the Q. No. 31 and 32).    450K 3 2 6 2BF 6NaH B H g 6NaF P Q      2 6 2 3 3 2 B H 6H O 2H BO 6H P R      2 6 2 2 3 2 B H 3O B O 3H O P M N    Molecular weight of   3 3 R H BO is 61.8