The speed of sound I gases depends on

a humidity

b air

c temperature

d visibility

The speed of sound in gases is represented mathematically as:

v (sound) = √γRT/M

where γ = adiabatic constant which is the ratio of the heat capacities at constant pressure and constant volume; Cp/Cv

R = gas constant

T = temperature

M = molar mass of the gas

Hence, the speed of sound in gas is directly proportional to the square root of temperature.

Ans: c) temperature