The gas which is filed in tungstoen lamp is ________.

The gas which is filed in tungsten lamp is ________.

The gas used in beacon lamps is

Name the fuel which is used in stoves, lamps :

What is a file ?

Atomic number of noble gas used in Becon lamp is Y, then Y/2 = ________

Among the following statements. 1. A discharge lamp uses a discharge tube which is filled with a gas at a very low pressure. 2. Always white light is emitted independent of gas taken in the lamp.