See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

2 a a 1 2 E E T T  1 200 100 T 298  T1 = 596 K = 323oC 26. o 3 2 6 180 C 2BF 6NaH B H 6NaF    27. P – F bond length is less than P – Cl bond length P – F 159.6 pm P – Cl 200.5 pm. 28. (i) Li has stronger reducing character than Na in aqueous solution. (ii) Li2CO3 is thermally less stable than Na2CO3. 29. Pyrosilicates have general formula   6 2 7 Si O . 30. (i) Formula of borax is Na2[B4O5(OH)4].8H2O. (ii) Aqueous solution of borax is weakly alkaline.