MCQ
Find the odd one out.
- AChlorine
- ✓Sodium
- COxygen
- DHelium
✓
Answer
Correct option: B.
Sodium
In this, sodium is the odd one out because, sodium, being an alkali metal, is photosensitive while the others are not photosensitive materials. Sodium metal emits electrons even when ordinary light falls on it. Therefore, it is known as a photosensitive material.
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