Question

The trend in the hydrides from $Bi$ to $N$ is :

• A. Bond length increases
• B. Bond length decreases
• C. Acidic nature increases
• D. Bond energy decreases

Answer 1

The correct option is B Bond length decreases

As size of the atom increases, the $E-H$ bond distance increases and hence bond strength decreases. So, acidic nature, down the group, increases.
Hence, option (b) is the correct answer.