Anil Ahlawat Solutions for Chapter: Atoms and Molecules, Exercise 1: EXERCISES

Four different experiments were conducted in the following ways :
I $3 \mathrm{g}$ of carbon was burnt in $8 \mathrm{g}$ of oxygen to give $11 \mathrm{g}$ of ${\mathrm{CO}}_2$.
II $1.2 \mathrm{g}$ of carbon was burnt in air to give $4.2 \mathrm{g}$ of ${\mathrm{CO}}_2$.
III $4.5 \mathrm{g}$ of carbon was burnt in enough air to give $11 \mathrm{g}$ of ${\mathrm{CO}}_2$.
IV $4 \mathrm{g}$ of carbon was burnt in oxygen to form $30.3 \mathrm{g}$ of ${\mathrm{CO}}_2$.
Law of constant proportions is illustrated in experiment(s)

Match column I with column II and mark the correct option from the given codes.

The atomic mass of oxygen is $16$ and the molecular mass of ozone is $48$. What is the atomicity of ozone, if it is an allotrope of oxygen?

Two samples $X$ and $Y$ of a pure substance obtained by two different methods contain elements $P$ and $Q$. Substance $X$ has a mass of $2.25 \mathrm{g}$ and contains $0.90 \mathrm{g}$ of $Q$. Substance $Y$ is made up of $60\% P$ and $40\% Q$ by weight. This is an illustration of

Which of the following represents the correct number of moles of each element in $40 \mathrm{g}$ of ferric sulphate? [Atomic mass of $\mathrm{Fe}=56 \mathrm{u}, \mathrm{S}=32 \mathrm{u},\mathrm{O}=16 \mathrm{u}$]

Which of the following molecules contains highest number of particles?

The graphical representation of number of molecules of different gases is given. Which gases are placed at correct position?

Sulphate of a divalent metal $\mathrm{M}$ exists in hydrated form. If $0.10$ mol of metal sulphate combines with $9.0 \mathrm{g}$ of water to form the hydrated salt then, the formula of metal sulphate will be