Consider the below statements and identify the correct answer. Statement-I: An Olfactory indicator is a material whose smell varies depending on whether it is mixed with an acidic or basic solution.
Statement-II: Onion, clove oil and vanilla extract are examples of some olfactory indicators

Correct option is B

Sol: The correct answer is (b) Both the statements are true.

​Statement-I: True.
An olfactory indicator is a material whose smell changes depending on whether it is in an acidic or basic medium. For example, some substances lose their characteristic smell in a basic medium but retain it in an acidic medium.

Statement-II: True.
Onion, clove oil, and vanilla extract are indeed examples of olfactory indicators. For instance:

• Onion smell diminishes in a basic solution but remains in an acidic one.
• Vanilla extract's smell vanishes in a basic medium.
• Clove oil's smell is also affected differently in acidic and basic mediums.

Information booster:

​Olfactory Indicators:​

• ​Olfactory Indicators are substances whose smell changes when they are exposed to an acidic or basic solution.
•  These indicators work based on the principle that chemical interactions with acids or bases alter their volatile compounds, leading to a change in their smell.​