Question
Chemistry Question on Chemical bonding and molecular structure
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
Answer
(ii) and (iii) only are correct
Explanation
Solution
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.