1. What is the difference between displacement and double displacement reaction? 2. Why combination reaction is opposite to decomposition re...

1. Phosphine has lower boiling point than ammonia. Why? 2. State allotropic properties of group 15 elements. 3. On moving down the group ato...

1. In case of chemisorption, adsorption first increases and then decreases, with increase in temperature. Explain. 2. What are the other met...