Questions

Argon gas is used in fluorescent and incandescent light bulbs to stop the oxygen in the light bulbs from corroding the hot tungsten filament.

The use of argon in light bulbs prevents the evaporation of the tungsten filaments, which results in increased light bulb life.

Argon is also used to create an inert atmosphere for growing semiconductor crystals, arc welding and for processes that need protection from other kinds of atmospheric gases.

Ans. E.
Option A: ‘legally state-issued currencies’ is incorrect. The word describes the state-issued currencies; hence it should be an adjective and not an adverb. Option B: ‘state-issues’ is incorrect and should be replaced by ‘state-issued’. Option C: ‘carry-in’ is grammatically incorrect. Option D: ‘to carrying out’ is grammatically incorrect.

The two functional groups Amine and carboxyl groups are always found in amino acids.

The Mirror can turn everything around without moving.

Prejudiced