Question

The bond lengths and bond angles in the molecules of methane, ammonia and water are given below .This variation in bond angle is a result of
(i) the increasing repulsion between hydrogen atoms as the bond length decreases
(ii) the number of non-bonding electron pairs in the molecule
(iii) a non-bonding electron pair having a greater repulsive force than a bonding electron pair

• A. (i), (ii) and (iii) are correct
• B. (i) and (ii) only are correct
• C. (ii) and (iii) only are correct
• D. (i) only is correct
• E. (iii) only is correct

Answer 1

Answer: (C)

The variation in bond angle in methane, ammonia and water is a result of the number of non-bonding pairs in the molecules and a lone pair (non-bonding electron pair) have greater repulsion force than bonding pair.