Question Paper
Class / Subject: Class 7 (ICSE) · Science
Chapter: Chapter 11 — Chapter 11: Atoms, Molecules and Radicals
Time Allowed: 32 minutes
Max Marks: 16
1. What does an atom consist of? [1]
(A) A nucleus and electrons
(B) Only electrons
(C) Only a nucleus
(D) Nothing specific
2. What is inside the nucleus of an atom? [1]
(A) Protons and neutrons
(B) Only electrons
(C) Only protons
(D) Nothing
3. What is a molecule? [1]
(A) Two or more atoms bonded together
(B) A single atom
(C) A type of radical only
(D) Nothing specific
4. What is an example of a molecule? [1]
(A) H2O
(B) A single hydrogen atom
(C) A proton
(D) A neutron
5. What is a radical? [1]
(A) A group of atoms acting as a single unit
(B) A single atom
(C) A type of molecule only
(D) Nothing specific
6. What is an example of a radical? [1]
(A) Hydroxide ion (OH-)
(B) Oxygen atom
(C) Hydrogen atom
(D) Carbon atom
7. What do radicals carry in reactions? [1]
(A) A charge
(B) No charge at all
(C) Only mass
(D) Only colour
8. Why understand atoms, molecules and radicals? [1]
(A) Fundamental for understanding chemical reactions
(B) No reason
(C) It's not useful
(D) Only for tests
9. What does an atom consist of? [1]
(A) A nucleus and electrons
(B) Only electrons
(C) Only a nucleus
(D) Nothing specific
10. What is inside the nucleus of an atom? [1]
(A) Protons and neutrons
(B) Only electrons
(C) Only protons
(D) Nothing
11. What is a molecule? [1]
(A) Two or more atoms bonded together
(B) A single atom
(C) A type of radical only
(D) Nothing specific
12. What is an example of a molecule? [1]
(A) H2O
(B) A single hydrogen atom
(C) A proton
(D) A neutron
13. What is a radical? [1]
(A) A group of atoms acting as a single unit
(B) A single atom
(C) A type of molecule only
(D) Nothing specific
14. What is an example of a radical? [1]
(A) Hydroxide ion (OH-)
(B) Oxygen atom
(C) Hydrogen atom
(D) Carbon atom
15. What do radicals carry in reactions? [1]
(A) A charge
(B) No charge at all
(C) Only mass
(D) Only colour
16. Why understand atoms, molecules and radicals? [1]
(A) Fundamental for understanding chemical reactions
(B) No reason
(C) It's not useful
(D) Only for tests