SF6 gas

Is yellow in colour
Is lighter than air
Is nontoxic
Has pungent small E. None of the above

The correct answer is: C. Is nontoxic

SF6 gas is a colorless, odorless, and non-flammable gas. It is also non-toxic and non-corrosive. SF6 gas is used in a variety of applications, including electrical insulation, circuit breakers, and gas-insulated switchgear.

Option A: SF6 gas is not yellow in color. It is colorless.

Option B: SF6 gas is not lighter than air. It is heavier than air.

Option D: SF6 gas does not have a pungent smell. It is odorless.

Option E: None of the above is correct.