Give reason for the following observations.
We can get the smell of perfume sitting several meters away.

Give reasons for the following observation: The smell of hot sizzling food reaches you several meters away, but to get smell from cold food you have to go close.

Give reasons for the following: NO_2 dimerises.

Give reasons for the following: NH_3 acts as a Lewis base.

Give reasons for the following: C-X bond length in halobenzene is smaller

Give reason for the following observations. Naphthalene balls disappear with time without leaving any solid.

Give reasons for the following: OF_6 compound is not known.

Give reasons for the following observations: sulphur exhibits greater tendency for catenation than selenium.

Give reasons for the following: Sulphur vapour is paramagnetic.

Give reasons for each of the following obervations: Diazonium ion acts as electrphile.

Give reasons for the following. Copper cannot displace zinc from its salt solution.