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

We know that,

$Bondstrength\propto Bondenergy\propto \frac{1}{Bondlength}$
Bond strength decreases from N to Bi.

$\therefore$ Bond length decreases from Bi to N. So, option B is correct.

The acidic nature of the hydrides decreases from bottom to top in the group. So, option C is correct.

Since bond length decreases from Bi to N, therefore, the bond energy increases. So, option D is incorrect.

Hence, option B is the correct answer.