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# Match the following:

$\begin{array}{ll} \text{Noble Gas} & \text{Uses}\\ \text{1. Krypton} & \text{a. Filling incandescent bulbs } \\ \text{2. Argon} & \text{b. Airport Runway lighting and approach lights } \\ \text{3. Xenon} & \text{c. Heat transfer medium for nuclear reactions } \\ \text{4. Helium} & \text{d. Photographic flash tubes } \end{array}$ $\begin{array}{1 1} 1 \rightarrow b, \; 2 \rightarrow a,\; 3 \rightarrow d,\; 4 \rightarrow c \\1 \rightarrow d, \; 2 \rightarrow c,\; 3 \rightarrow a,\; 4 \rightarrow b \\1 \rightarrow b, \; 2 \rightarrow a,\; 3 \rightarrow c,\; 4 \rightarrow d \\ 1 \rightarrow a, \; 2 \rightarrow b,\; 3 \rightarrow d,\; 4 \rightarrow c \end{array}$
Can you answer this question?

Answer: $1 \rightarrow b, \; 2 \rightarrow a,\; 3 \rightarrow d,\; 4 \rightarrow c$
1. Krypton $\rightarrow$ Used in airport runway and approach lighting as it gives longer life to incandescent lighting compared to Argon even though its more expensive.
2. Argon $\rightarrow$ Used in incandescent bulbs as it prevents vaporization of tungsten and blackening of bulbs.
3. Xenon $\rightarrow$ Used in flash lights for cameras as it has a fast response to electric current.
4. Helium $\rightarrow$ Used in nuclear reactions as it does not become radioactive and transfers heat easily.
answered Jul 27, 2014