Odisha Board Solutions for Chapter: Basic Concepts Atoms & Molecules, Exercise 3: QUESTIONS

Define molecular mass.

Explain gram molecular mass.

What is the difference between normal density and relative vapour density?

Is there any difference between the molecular weight and mass of one molecule of a gas ? Explain.

Explain why some gases show abnormal density.

Describe Victor Meyer's method for determining the molecular mass of a substance. $0.1$ gm of a volatile substance on vaporisation in Victor Meyer's experiment displaced $123$ ml moist air at $15°\mathrm{C}$ and$740$ mm pressure. Calculate the molecular mass of the substance. (Aqueous tension at $15°\mathrm{C} = 12.7$ mm)

Define vapour density. How will you determine the vapour density of a volatile substance ?

Derive the relationship between molecular mass and vapour density of gas from Avogadro's hypothesis. $0.796$ g of a metal oxide was heated in a current of dry hydrogen when.$0.18$ g of water was formed. Calculate the equivalent mass of the metal.