When radioactive minerals like cleveite, monozite and pitch blende are heated to 1273 K in vacuo, the noble gas obtained is
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.
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Correct Answer - C
These radioactive minerals have entrapped He atoms, produced from `alpha`-particle, which they give on heating in vacuo.
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