Question

In certain reactions a change of smell is observed. Give two examples from daily life of the same.

Answer 1

In certain chemical reactions – a change of smell is seen to be observed.

1. A fresh egg gets spoiled and turns into a rotten egg, or fresh food on keeping for a long time gets spoiled. Thus a chemical change may have undergone, which many result in a change in odour [foul smell maybe Evolved].
2. A piece of fresh bread is kept in the open for a few days. A foul smell maybe observed along with growth of fungus, after keeping the bread for a prolonged time.