Convert the following temperatures to the Kelvin scale.

(a) 25°C

(b) 373°C

Give reason for the following observations:

(a) Naphthalene balls disappear with time without leaving any solid.

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

What is the physical state of water at?

(a) 25°C

(b) 0°C

(c) 100°C?

Give two reasons to justify –

(a) water at room temperature is a liquid.

(b) an iron almirah is a solid at room temperature.