Which among the following changes cannot be reversed?

Making yogurt from milk

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Boat made from paper

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Addition of salt in water

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Melting of chocolate

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Solution

The correct option is A Making yogurt from milk
Some objects can be changed into their original form by changing some conditions.
Some objects cannot be changed into their original form.
Yogurt or curd cannot be changed back into their original form, which is milk. Folding of paper, dissolving salt in water, and melting chocolate can be changed into their original form.

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Similar questions

Which of the following can be categorised as both reversible and irreversible change?

Q. Which of the following change can be reversed?

Which of the following statements is incorrect?

Statement 1: Changes are the differences in the state of affairs.

Statement 2: Change can be grouped into reversible and irreversible change.

Statement 3: Changes that can not be undone are reversible changes and changes that can be undone are irreversible changes.

Statement 4: There are many ways in which change can be brought about.

Question 15

Give one example in each case.
Change which occurs on heating but can be reversed.
Change which occurs on heating but cannot be reversed.
Change which occurs on cooling but can be reversed.
Change which occurs on mixing two substances but can be reversed.
Change which occurs on mixing two substances but cannot be reversed.

Q. A change that cannot be reversed is called ________ change, while the change which can be reversed is called _______ change.

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