Question

Consider the following statements:

(i) Chemical changes are irreversible.

(ii) Chemical changes produce new substances.

(iii) Chemical changes does not involve large energy changes.

Which among these are incorrect?

• A. (i) and (ii)
• B. (i), (ii) and (iii)
• C. (ii) and (iii)
• D. (iii)

Answer 1

The correct option is D

(iii)

Chemical change results in the formation of a new chemical substance and are mostly irreversible. It involves making or breaking of bonds between the atoms. Large energy changes might be involved during a chemical change.