Convert the following temperatures to celsius scale.
(a) $293 \mathrm{K}$
(b) $470 \mathrm{K}$

Give reason for the following observation.

Naphthalene balls disappear with time without leaving any solid.
 

Give reason for the following observation:

We can get the smell of perfume sitting several metres away.

Give two reasons to justify-

Water at room temperature is a liquid.

Give two reasons to justify-

An iron almirah is a solid at room temperature.