Question

A mixture of gases contains H₂ and O₂ gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?

(a) 16 : 1 

(b) 2 : 1 

(c) 1 : 4

(d) 4 : 1

Answer 1

Answer - (d) 4 : 1

 

Solution - 

H₂ and O₂ are present in 1 : 4 ratio, thus lets assume 100g od H₂ and 400g of O₂

no. of moles of Hydrogen = 100/2 = 50

no.of moles of Oxygen = 400/32 = 12.5

ratio = 50 : 12.5 → 4 : 1