Question

A mixture of gases contains H2and O2,gases in
the ratio of 1:4 (w/w). What is the molar ratio of
the two gases in the mixture? [AIPMT-2015]
(1) 2:1
(2) 1:4
(3) 4:1
(4) 16:1​

Answer 1

Answer: 4:1

Explanation: Number of moles is weight/mol.mass. Molecular weight of h2 is 2 and that of O2 is 32.

So molar ratio = 1/2 : 4/32

= 4:1

Answer 2

4:1 is the molar ratio of H² and O²