Question

.Select the correct statements from those given below: A: All chemical changes are irreversible B: All physical changes are followed by chemical changes C : All chemical changes are followed by physical changes D : During a physical change the molecular formula of the substance involved also changes

Answer 1

Answer:

C

Explanation:

All chemical changes are accompanied by physical changes because in the case of rusting, a new substance is produced with a new and different physical appearance than the substance before the chemical change occurred

Answer 2

Answer:

A. All chemical changes are irreversible.

Explanation:

Because in a chemical change new substances are formed. The reaction may absorb or evolve heat too.

In a chemical change physical and chemical properties of the substances also change.

hope it helps