Question

Which of the following statement regarding usage of noble gases is incorrect?

• A. Helium is used as a coolant in nuclear reactors.
• B. Krypton is used in light house lamps.
• C. Neon is used in advertising sign lamps.
• D. Radon is used in the flash units photographic camera.

Answer 1

The correct option is D Radon is used in the flash units photographic camera.

Following are the usage of noble gases:

• Helium condenses at very low temperature. So, it can be used as a coolant in nuclear reactors.
• Krypton is used in light house lamps as it gives intense white light when electric current passes through it.
• Neon is used in advertising sign lamps as it emits reddish orange glow when electricity passes throught it.
• Xenon is used in the flash units photographic camera as it gives intense white light when white light passes through it.
• Radon is used to treat cancer patients as it is a product of radioactive decay of Uranium.