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Group 18 Elements

Question

Which of the following statements is not correct?

A

Krypton is obtained during radioactive disintegration

B

Half life of radon is only 3.8 days

C

Argon is used in electric bulbs

D

Helium is used in producing very low temperatures

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Solution

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Correct option is B. Krypton is obtained during radioactive disintegration

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