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When radioactive minerals like cleveite,...

When radioactive minerals like cleveite, monozite and pitch blende are heated to 1273 K in vacuo, the noble gas obtained is

A

Rn

B

Kr

C

He

D

Ne.

Text Solution

Verified by Experts

The correct Answer is:
C
These radioactive minerals have entrapped He atoms, produced from `alpha`-particle, which they give on heating in vacuo.
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