Page 19 - Spotlight A+ Form 4 & 5 Chemistry KSSM

Form
4
Chapter 5 Chemical Bond Chemistry

Paper 1

1. Which of the following pairs of physical
properties of sodium oxide, Na O is true? C2 C
2
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Solubility in Electrical conductivity
water when molten D
A Soluble Conducting
B Soluble Not conducting
C Insoluble Not conducting
D Insoluble Conducting
6. Ethanol, C H OH is a covalent compound that
5
2
2. Which of the following substances is a covalent can dissolve in water. Which of the following
compound? C1 explain the solubility of ethanol, C H OH in
A Magnesium chloride, MgCl water? C2 2 5
B Calcium oxide, CaO A Ethanol molecules ionise in water.
C Lead(II) chloride, PbCl 2 B Ethanol molecules form hydrogen bonds
D Carbon dioxide, CO 2 with water molecules.
C Ethanol molecules form dative bonds with
3. The following shows information of a few water molecules.
elements. D Ethanol molecules donate electron to water
V: Sulphur molecules.
CHAP. W: Silver 7. Figure 1 shows the electron arrangement of an CHAP.
SPM Clone
5 X: Carbon ion M . Given that atom M has 18 neutrons. 5
–
Y: Chlorine
Z: Oxygen –
Which of the following elements can react to
form an ionic compound? C2 M
A V and X C X and Y
B W and Z D Y and Z
Figure 1
4. Which of the following compounds has the What is the nucleon number of atom M? C2
lowest melting point? C2 A 8 C 22
A Sodium chloride, NaCl B 10 D 35
B Sulphur dioxide, SO 2
SPM Clone
C Iron(III) oxide, Fe O 3 8. The electron arrangement of an atom J is 2.1 and
2
D Magnesium chloride, MgCl the electron arrangement of an atom T is 2.6.
2
Atom J reacts with atom T to form a compound.
5. Which of the following diagrams shows a Which of the following is true about the
compound that consists of double covalent reaction? C2
bonds? C1 A Atom T donates 6 electrons.
A B Atom J receives 1 electron.
C An ionic compound is formed.
D The chemical formula of the compound
B formed is JT .
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