Question

Classify the following as a physical or chemical change, mention the reason:

a) Drying a shirt in the sun.

b) Rising of hot air over a radiator.​

Answer 1

Answer:

Clothes won't shrink, too. And according to Washer/Dryer Comboz, sun is a “natural sanitizer”, so if you dry you clothes under sun, they will smell cleaner and fresher. Sun can bleaching the clothes, it can make white clothes whiter, but make other clothes color lighter, too. Sun can also disinfect your clothes.

Explanation:

Since, in rising of hot air over a radiator no new substance is formed, hence it is a Physical change. (c) Burning of kerosene in a lantern. Answer: While burning of kerosene in a lantern carbon dioxide, and water vapour is formed, hence it is a Chemical change.