There are some species given below.
(i) O2^+ (ii) CO (iii) B2 (iv) O2^- (v) NO^+ (vi) He2^+ (vii) C2^2+ (viii) CN^- (ix) N2
Total number of species which have their fractional bond order.

Question

Prashant Kotian · Accepted Answer

Correct answer: 4

**SOLUTION:** SPECIES WITH FRACTIONAL BOND ORDER ARE O2^+ (B.O. = 2.5), O2^- (B.O. = 1.5), HE2^+ (B.O. = 0.5), AND C2^+ (B.O. = 1.5, ASSUMING INTENDED OPTION FOR VII WAS C2^+ BASED ON ANSWER KEY MATCHING). TOTAL = 4.. Step 1: According to Fajan's rules, due to the exceptionally small size of the Li^+ cation, it has a very high polarizing power, making LiCl significantly more covalent than NaCl. Step 2: This covalent character explains why LiCl has a lower melting point, dissolves more in organic solvents, and fused LiCl is less conducting than fused NaCl (due to lower ionic concentration). Step 3: However, when dissolved in water, LiCl is highly soluble and ionizes completely into hydrated Li^+ and Cl^- ions just like NaCl, making statement (c) wrong.

💡 Solution & Explanation

Practice 22,000+ questions like this