Question

Which of the following trend(s) is correct for the hydrides from $N$ to $Bi$ is :

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

Answer 1

Answer: (A), (B), (D)

Acidic nature increases

As size of the atom increases, the $E-H$ bond distance increases and hence bond strength decreases. So, acidic nature, down the group, increases.