tar is burned to build roads. Can this change be reversible?

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Solution

The tar that is used in roads cannot be obtained back in its original form. It is therefore an irreversible change.

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Question 8

Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a:
(a) physical change that can be reversed
(b) chemical change that can be reversed
(c) physical change that cannot be reversed
(d) chemical change that cannot be reversed

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