Question

A gas is found to have the formula (CO)$^n$. If its vapour density is 56, the value of n will be

• A. 7
• B. 5
• C. 4
• D. 3

Answer 1

Answer: (C)

4

Answer 2

V.D. = 56 Mol. mass = 2 $\times$ V.D. = 2 $\times$ 56 = 112 (CO)$^n$ = 112 or (12 + 16)$^n$ = 112 (28)$^n$ = 112 or $n = \frac{112}{28}= 4$