Question

Which of the following changes cannot be reversed?

• A. Flower to fruit
• B. Sheet of paper to paper boat
• C. Making of yogurt from milk
• D. Dissolving sand in water

Answer 1

Answer: (A), (C)

The correct options are
A Flower to fruit
C Making of yogurt from milk

The changes which are lifelong and cannot be reversed are called permanent changes.

Once the fruit is obtained from the flower it cannot be converted back to fruit. Similarly, yoghurt can't be converted back to milk. Therefore, these changes cannot be reversed.