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Pick out the correct statement/s about n...

Pick out the correct statement/s about noble gases

A

'He' cannot be used in preference to nitrogen(N) to dilute the oxygen in the gas cyclinders used by divers.

B

'He' is used in weather balloons and airships.

C

'He' is used in cryoscopy to obtain the very low temperatures required for superconductivity and lasers.

D

'Ar' is used in metallurgical processes.

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
He `to` weather bolloons and airships.
He - in cryoscopy to obtain the very low temperature required for super conductivity and layers.
Ar - is used in matallurgical processes.
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