Question

Classify the following change in as many ways as possible.
Burning of paper

Answer 1

The following changes were observed during the burning of paper:

• Fast change: The type of changes that take place in a short period of time is called fast changes.
• It is a fast change because it takes place very quickly, in a short span of time.
• Chemical change: A change in which the composition and chemical properties of the substance get changed is called a chemical change.
• During a chemical change, one or more new substances are formed.
• During the burning of paper, ash is formed and Carbon dioxide$\left({\mathrm{CO}}_2\right)$ is released.
• As new substances are being formed, they can be considered to be a chemical change.
• Non-periodic change: The changes that do not occur periodically at regular intervals are known as non-periodic changes.
• Burning of paper is considered to be a non-periodic change because no regular time intervals are required for the change to occur.
• Irreversible change: The change which cannot be reversed even by changing conditions is said to be an irreversible change.
• As new substances are being formed, it is not possible to convert them back to their original form.