KCET 2014 Chemistry Solved Paper

From ideal gas equation ρ=‌

pM

RT

→ (1)
In Eq. (1), R and M is constant for a gas.
Therefore, ρ∝‌

p

T

The p/T ratio is highest at 4 atm and 500 K.
Therefore, density of carbon monoxide is maximum at 4 atm and 500 K.