Question

One of the following is not a chemical change. This one is:
Decaying of jute bag
Drying of cotton cloth
Ripening of bananas
souring of milk

Answer 1

To find:

Which of the following is not a chemical change?

• Decaying of jute bag
• Drying of cotton cloth
• Ripening of bananas
• Souring of milk.

Solution:

• A chemical change is such a reaction in which there is breakdown of old chemical bonds and formation of new chemical bonds between various atoms.

• A physical change only involves change in States of matter and does not involve formation of new chemical bonds.

So, drying of cotton cloth is not a chemical change , its a physical change.

• This is because drying of cotton clothes refer to evaporation of liquid water molecules into vapour state.

• Hence its a physical change.

Answer 2

Explanation:

ड्राइंग ऑफ कॉटन क्लोथ्स