Question

True or False:

1. Formation of π bond shortens the distance between the two concerned atoms.

2. A bond is stronger than a σ bond. 

3. All molecules with polar bonds have dipole moment.

4. The H-N-H bond angle in NH₃ is greater than the H-As-H bond angle in AsH₃.

Answer 1

1. True

2. False

3. False

Symmetrical molecules with polar bonds have zero dipole moment.

4. True

Formation of ammonia involves sp³ hybridisation while no hybridisation occurs in AsH₃ formation.