Chemistry
Grade-9
Easy
Question
Which group is distinguished by colourless monoatomic gases that lack any taste or smell?
- Pnicogens
- Chalcogens
- Noble gases
- Halogens
Hint:
Noble gases have valence zero they show the least reactivity.
The correct answer is: Noble gases
- Under standard temperature pressure noble gases are colorless monoatomic odorless.
- As they have valence zero they show the least reactivity.
- Due to zero valence they cannot combine with other atoms. Hence, they are distinguished this way.
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