Select the correct statement(s) about uses.

A $ClF X_{3}$ is used in the production of $UF X_{6}$ for nuclear fuel
BHelium-oxygen mixtures are used by deep-sea divers
CNeon is used to provide an inert atmosphere in arc welding
DRadon is used in the radiotherapy of cancer

Answer: A, B, D

ClF X_{3}

is a fluorinating agent that converts uranium to

UF X_{6}

. Helium is much less soluble in blood than nitrogen, so He-

O X_{2}

mixtures are used for deep diving. Radon is used in radiotherapy. The inert atmosphere for arc welding is provided by argon, not neon, so option 3 is false.

Practice p-Block Elements: Groups 17 and 18 More on Interhalogen compounds and polyhalide ions

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