Updated By SaraNextGen

On March 11, 2024, 11:35 AM

Question 7.1:

Why are pentahalides more covalent than trihalides?

Answer:

In pentahalides, the oxidation state is +5 and in trihalides, the oxidation state is +3. Since the metal ion with a high charge has more polarizing power, pentahalides are more covalent than trihalides.

Question 7.2:

Why is BiH₃ the strongest reducing agent amongst all the hydrides of

Group 15 elements?

Answer:

As we move down a group, the atomic size increases and the stability of the hydrides of group 15 elements decreases. Since the stability of hydrides decreases on moving from NH₃ to BiH₃, the reducing character of the hydrides increases on moving from NH₃ to BiH₃.