Vapour density of mixture of NO2 ​and N2O4 ​ is 34.5, then percentage abundance of NO2 ​ in mixture is:

 Answer Key: 50 %

A gaseous mixture of H2 ​and CO2 ​contains 66 mass % of CO 2 ​ The vapour density of the mixture is:

 Answer Key: VD :2.7