Which statement best describes an olfactory indicator?
A substance that changes smell in acids and bases
Correct Answer: A substance that changes smell in acids and bases
An olfactory indicator is a substance whose odour (smell) changes in acidic or basic medium.
Examples:
- Onion: Pungent smell in neutral; smell disappears in basic solution
- Vanilla essence: Pleasant smell; smell disappears in basic medium
- Clove oil: Smell changes in acidic/basic medium
Olfactory indicators are used by people with colour blindness who cannot use colour-change indicators like litmus.
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Important Questions from Basic Concepts of Chemistry
Which of the following given below is an alloy of mercury?
The chemical symbol of potassium is _______.
In a molecule of water, the ratio of the mass of hydrogen to that of oxygen is:
Which is the element having the highest atomic mass among the following?
Each water molecule, contains _______ hydrogen atoms and one Oxygen atom.
