Chemical Changes and Paper Burning

The video tutorial explains the concept of chemical changes using the example of burning paper. It demonstrates how burning paper results in a rapid transformation, leaving behind ash with different properties. The tutorial highlights that this change is irreversible, confirming it as a chemical change.

What is the example used to explain chemical changes?

• Burning of paper

• Rusting of iron

• Boiling of water

• Melting of ice

What happens to the paper when it is burned?

• It melts

• It evaporates

• It burns rapidly

• It dissolves

What is left behind after the paper burns?

• Liquid residue

• Black color ash

• White powder

• Nothing

Can the original form of paper be obtained from the ash?

• Yes, easily

• Yes, with difficulty

• No, it is impossible

• Yes, with special equipment

What does the burning of paper confirm?

• It is a reversible change

• It is a temporary change

• It is a physical change

• It is a chemical change