Molecular weight $=$ vapour density $\times$ 2, is valid for:

Q. Assertion : Molecular weight of a compound is $180$, if its vapour density is $90$.
Reason : $\text{Molecular weight}=\frac{\text{Vapour density}}{2}$

Q. Vapour density of metal chloride is $77$. Equivalent weight of metal is $3$ then, its atomic weight will be :

Q. The density of air is $0.001293{\text{g/cm}}^3$ at STP(atm). Which of the following statements is/are correct?

Q. The equivalent weight of a metal is 9 and the vapour density of its chloride is 59.25. The atomic weight of metal is:

Q. The vapour density of a gas is $22$. Its molecular weight is: