Question

Select the correct answer from the choices A, B, C, and D which are given. Write only the letter corresponding to the correct answer.

A physical change occurs when:

• A. Both the appearance of a substance and its identity change.
• B. The appearance of a substance changes but its identity does not
• C. The identity of a substance changes but its appearance does not
• D. Neither the appearance of a substance nor its identity changes.

Answer 1

The correct option is B

The appearance of a substance changes but its identity does not

Explanation for correct option:

Option B

Physical change:

• A physical change is a change in which no new substance is formed.
• A physical change is temporary and reversible.
• In a physical change, the chemical composition of the original substance is not altered.
• In a physical change, there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
• For example, drying wet clothes, breaking of a glass tumbler, drying paints, etc.

Therefore, option B is correct.