Ans: Diurnal range of temperature is the difference between maximum and minimum temperature of a day. Diurnal range of temperature is high in the deserts like Rajasthan, Thar Desert and interior parts of Rann of Kutch. In these sandy areas the day temperature may raise upto 50 C and by night the temperature drops down to nearly freezing point. This happens because during the day time, sand absorbs heat very fast and at the same time loses heat very fast at night.