Page 80 - Chemistry_Form_2

Chemistry
for Secondary Schools

3. What happens during the formation of ions?

(a) Non-metal atoms gain protons.
(b) Metal atoms lose their outermost electrons.

(c) Metal atoms gain electrons in their outermost shells.
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(d) Non-metal atoms lose electrons of their outermost shells.

4. Electrovalent bonding occurs between
(a) metals and metals.

(b) metals and non-metals.
(c) metals and inert gases.
(d) non-metals and non-metals.

5. The following atoms cannot exist freely as single atoms, except
(a) sodium.

(b) chlorine.
(c) argon.
(d) magnesium.

6. A covalent bond is formed due to

(a) opposite charges of atoms.
(b) transfer of electrons of atoms.
(c) forces of attraction between atoms.
(d) sharing of electrons between atoms.

7. Which of the following is a property of covalent compounds?
(a) They do not conduct electricity.
(b) Atoms share only two pairs of electrons.
(c) Mostly are soluble in water.

(d) Their melting and boiling points are very high.

8. What is the oxidation number of nitrogen in NH ?
+
4
(a) +1 (b) –3 (c) +4 (d) +5
9. Which among the following is the correct valency of the phosphate radical?
(a) 5 (b) –3 (c) 3 (d) –5

Student’s Book Form Two 73

01/08/2025 11:20:57
CHEMISTRY FORM TWO NEW 2025 DUMMY.indd 73 01/08/2025 11:20:57
CHEMISTRY FORM TWO NEW 2025 DUMMY.indd 73