Question

III. Give reasons :
1. Xenon arc lamps are used is lighthouses.
2. Neon is used in advertising glow tubes
called neon sign tubes.​

Answer 1

2 answer-

Explanation:

Neon is used in advertising glow tubes because when electricity passes through, it starts glowing in an orange-red colour.

As it has a very good glow so it is used in signboards etc.

Also, it is a noble gas, so it does not undergo any reaction and thus, can be used.

It is safe to use.