Question

1. Few children were inflating balloons.
2. Farmers were harvesting crops in their fields.

Among the following mentioned observations, which are the examples of reversible change?

• A. Only observation 1 is a reversible change.
• B. Only observation 2 is a reversible change.
• C. Both observation 1 & observation 2 are reversible changes.
• D. Both observation 1 & observation 2 are not reversible changes.

Answer 1

The correct option is A

Only observation 1 is a reversible change.

Reversible change refers to a physical change that can be undone. Among the given options,

1. Inflating balloons is a reversible change as once we remove the pressure from the balloon's mouth, the air escapes out and the balloon comes back to its original shape and size. Hence the change caused by inflating a balloon can be undone.
2. Harvesting crops is not a reversible change as once the crops are harvested they cannot be rejoined to grow.