One mole of triatomic vapours of an unknown substance effuses 1/2 times of 1 mole of O₂ under identical conditions.

Last updated: 7/4/2022

One mole of triatomic vapours of an unknown substance effuses 1/2 times of 1 mole of O₂ under identical conditions. If the density of unknown vapours at pressure P and temperature T is d, which of the following statement(s) is/are correct for the unknown substance? (A) Density at NTP = 5.71 g/L (B) z(compressibility factor) = 15P/4dRT (C) Vapour density = 64 (D) Vapour density = 16