Question

Find the vapour density of a gas if its density is 0.178 g/L at NTP.

• A. 2.17
• B. 0.178
• C. 4
• D. 0.89

Answer 1

We know,
Vapour density (VD) $=\frac{MolarMass}{2}$

So, in 1 L of gas, 0.178 g mass is present. Therefore, vapour density $=\frac{0.178}{2}$

Thus, vapour density = 0.089

Conclusion: The correct option is (D) 0.089