MCQ
Which is called lazy gas?
- A$Kr$
- ✓$Ar$
- C$He$
- D$Ne$
✓
Answer
Correct option: B.
$Ar$
Argon is lazy gas because during his experiments to remove all gases from air, Sir William Ramsay kept getting the same proportion of an inert gas left behind. He did a lot of experiments to make this gas react with most reactive substance like fluorine, potassium etc. but it did not react with anything. He named this gas argon from a Greek word 'Argos' which means lazy or inert or inactive.
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