State law of constant proportions.

Important Questions on Atoms and Molecules

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 3

Name the building block of all matter.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 4

What are the symbols of copper and cobalt?

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 5

Name two elements whose symbols are derived from Latin names. Give their symbols.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 6

What is the mass of $1\mathrm{mol}$ of water?

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 7

Give symbols of lead and aluminium.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 8

If $1\mathrm{g}$ of carbon contains $\mathrm{X}$ atoms, what will be the number of atoms in $1\mathrm{g}$ of magnesium? (Atomic mass of $\mathrm{C}=12; \mathrm{Mg}=24$).

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 9

What is meant by 1 mol of carbon atoms?

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 10

What is the molecular mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$?