2. Rahul appeared in class test but he confused to know the incorrect statement. Would you help him to know that? a. Those changes in which no new substance are formed, are called physical changes. b. The physical changes are temporary changes are temporary changes which can be reversed easily to form the original substance. c. Those changes in which new substance are called chemical changes. d. The chemical changes are permanent changes which are usually reversible.
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The incorrect option is d) The chemical changes are permanent changes which are usually reversible.
Explanation:
- In the field of chemistry, chemical change can be described as a change when two or more substances join to form a new compound.
- A chemical reaction is non reversible because a new compound is formed and it is difficult to change the new compound back.
- However, a physical change is reversible as in this change no new compounds are formed. Only, the substances changes its state.
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Option d is the correct answer
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