Question

A gas is found to have a formula $[CO]_x$. If its vapour density is 70, the value of x is

• A. 2.5
• B. 3
• C. 5
• D. 6

Answer 1

Answer: (C)

5

Answer 2

Molecular weight = 2 $\times$ vapour density = 2 $\times$ 70 = 140 $\because$ $(CO)_x - 140$ $\therefore$ (12+ 16)x = 140 $\therefore$ 28 x = 140 $\therefore$ x = 5