Question

Olfactory indicators are used to ______________.

• A. detect acid and base
• B. ensure the participation of visually impaired students
• C. both A and B
• D. determine the strength of acid and base

Answer 1

The correct option is C both A and B

Substances that change their smell when mixed with acid or base are known as olfactory indicators.

For example, onion, vanilla, clove, etc.

Olfactory indicators are used to ensure the participation of visually impaired students in the laboratory.

Hence, the correct option is $\text{C}$.