MCQ on Atoms and Molecules for Competitive Exams 2024

Test your knowledge with this challenging MCQ on Atoms and Molecules! Get ready to learn and level up your understanding of the world around us. This topic is useful for the students Class 9th to 12th and for those preparing for Competitive Exams like UPSC , SSC and other State Level Exams

MCQ on Atoms and Molecules

1. What is the smallest unit of an element that retains its properties?

A) Molecule

B) Atom

C) Proton

D) Neutron

2. What are atoms made up of?

A) Protons only

B) Electrons only

C) Protons, neutrons, and electrons

D) Neutrons only

3. What is the nucleus of an atom composed of?

A) Protons and electrons

B) Neutrons and electrons

C) Protons and neutrons

D) Neutrons and positrons

4. What is a molecule?

A) The smallest unit of an element

B) A group of atoms bonded together

C) A subatomic particle

D) A type of ion

5. Which force between atoms arises as a result of electron transfer?

A) Ionic bond

B) Covalent bond

C) Hydrogen bond

D) Van der Waals force

6. What is the charge of a proton?

A) Positive

B) Negative

C) Neutral

D) Variable

7. Which subatomic particle has negligible mass?

A) Proton

B) Neutron

C) Electron

D) Positron

8. What is the atomic number of an element equal to?

A) Number of neutrons

B) Number of protons

C) Number of electrons

D) Sum of protons and neutrons

9. Which theory states that atoms are indivisible particles?

A) Einstein’s Theory of Relativity

B) Newton’s Laws of Motion

C) Dalton’s Atomic Theory

D) Bohr’s Atomic Model

10. Which of the following is an example of a molecule?

A) Neon (Ne)

B) Hydrogen (H)

C) Sodium chloride (NaCl)

D) Oxygen (O2)

MCQ on Matter in our Surroundings