Question

The density of gas A is four times that of gas B. If
the molecular weight of A is M, then at same
pressure and temperature molecular weight of B is
(a) 2M
(b) M/2
(c) 4M
(d) M/4​

Answer 1

Answer:

It's very simple first you have to note down the density of gas a and gas b and then molecular weight of A is M

density = weight of gasA / weight of gas B

M = M/A

then, A= 1