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The substances whose odour changes in a...

The substances whose odour changes in acidic and basic solutions are known as

A

olfactory indicators

B

acid base indicators

C

visual indicators

D

all of these .

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for substances whose odor changes in acidic and basic solutions. 2. **Identifying the Type of Indicator**: The substances that change their properties (in this case, odor) in response to pH changes are known as indicators. 3. **Defining Olfactory Indicators**: Specifically, the substances that change odor in acidic and basic solutions are referred to as olfactory indicators. 4. **Examples of Olfactory Indicators**: Common examples include onion, clove oil, and vanilla extract. These substances have distinct odors that can change depending on the pH of the solution they are in. 5. **Conclusion**: Based on the definitions and examples provided, the correct answer to the question is that these substances are known as "Olfactory Indicators". **Final Answer**: The substances whose odor changes in acidic and basic solutions are known as **Olfactory Indicators**. ---
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for substances whose odor changes in acidic and basic solutions. 2. **Identifying the Type of Indicator**: The substances that change their properties (in this case, odor) in response to pH changes are known as indicators. 3. **Defining Olfactory Indicators**: Specifically, the substances that change odor in acidic and basic solutions are referred to as olfactory indicators. ...
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