Page 17 - 1202 Question Bank Chemistry Form 4 KSSM

PAPER 1

Each question has four different answers, A, B, C and D. For each question, choose one answer only.

5.1 Basics of Compound Formation 6. An atom of element E has 12 neutrons. The nucleon
SPM
SPM number of element E is 23. Atom E loses electrons to
1. Ionic bond is formed when CLONE form ion E. How many electrons are there in ion E?
A non-metal atoms share electrons. A 1 C 10
B nucleus of atom attracts valence electrons. B 8 D 11
C nucleus of non-metal atoms attracts each other.
D metal atoms transfer electrons to non-metal atoms. 5.2 Ionic Bond
©PAN ASIA PUBLICATIONS

2. Which atom forms a cation? 7. Diagram 2 shows a snail. The snail shell contains a
SPM
SPM A Chlorine C Sodium SPM natural ionic compound.
SPM
CLONE CLONE
B Oxygen D Carbon
3. What is the meaning of covalent bond?
SPM A A bond is formed when metal atoms share electrons Diagram 2
SPM
CLONE
with each other to achieve a stable electron Other than carbon, what elements are contained in the
arrangement. ionic compound?
B A bond is formed when non-metal atoms share A Calcium and oxygen
electrons to achieve a stable electron arrangement. B Sodium and oxygen
C A bond is formed when non-metal atoms transfer C Calcium and hydrogen
electrons to metal atoms. D Sodium and hydrogen
D A bond is formed when metal atoms transfer
electrons to non-metal atoms. 8. Which substance is an ionic compound?
SPM A Carbon monoxide, CO
SPM
4. Which statement best explains the formation of a CLONE B Sulphur trioxide, SO
SPM covalent bond? C Silicon dioxide, SiO 3
SPM
CLONE 2
A Metal atoms share electrons with non-metal atoms. D Magnesium oxide, MgO
B Non-metal atoms share electrons with non-metal
atoms. 9. Which compound is formed by transferring electrons?
C Metal atoms donate electrons while non-metal SPM A Hydrogen chloride, HCl C Ammonia, NH
SPM
atoms accept electrons. CLONE B Lithium oxide, Li O D Oxygen, O 3
D Non-metal atoms donate electrons while metal 2 2
atoms accept electrons. 10. Diagram 3 shows the electron arrangement of a
SPM chemical compound.
SPM
5. Diagram 1 shows the electron arrangement of a CLONE + 2– +
SPM
SPM potassium ion.
CLONE
+ Q R Q
K
Diagram 3
What are the elements represented by Q and R?
Diagram 1
What is the number of valence electrons of the Q R
potassium atom? A Sodium Oxygen
A 1 B Oxygen Sodium
B 7 C Lithium Fluorine
C 8
D 9 D Fluorine Lithium

56 Question 2: Question 8:
SOS TIP Cation is positive ion that is produced when a neutral atom loses its Ionic compound is formed when metal reacts with non-metal.
valence electron.
Question 6:
56 Nucleon number – proton number (number of protons) = number of
neutrons