Question

Match the following noble gases with their usage.

$\begin{array}{cc}\text{Noble Gas}& \text{Usage}\\ \text{A)}\text{Helium}& 1)\text{Treatment of cancer patients}\\ \text{B)}\text{Neon}& 2)\text{Used in advertising sign lamps}\\ \text{C)}\text{Radon}& 3)\text{Used in airport runway light}\\ \text{D)}\text{Krypton}& 4)\text{Used as a coolant in nuclear reactors}\end{array}$

• A. A-2, B-3, C-4, D-1
• B. A-4, B-2, C-1, D-3
• C. A-1, B-2, C-3, D-4
• D. A-2, B-1, C-4, D-3

Answer 1

The correct option is B A-4, B-2, C-1, D-3

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.
• Radon is used to treat cancer patients as it is a product of radioactive decay of Uranium.

Therefore, the correct match is: A-4, B-2, C-1, D-3.