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S3 Chemistry 2nd term Test Revision

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.
What two types of atoms make a covalent bond?
a)

2 Non-metals

b)

1 Non-metal and 1 Metal

c)
2 Metals
d)
2 Noble Gases
2.
How are covalent bonds explained?
a)
When one atom takes the other atom's electron
b)
When the atom shares an electron with an another atom
c)
When the two nucleus merge
d)
When the neutrons leave the nucleus
3.
What region of the periodic table contains atoms that form covalent bonds?
a)
the left side
b)
the middle
c)
the right side
d)
top left
4.
What molecule is this?
a)
CO
b)

CO2

c)

C2O

d)

C2O2

5.

Covalent compounds ......

a)
Share electrons
b)
transfer electrons
c)
None
d)
conduct electricity
6.

What type of bond involves the sharing of electrons between atoms?

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

transfer bond

7.

A bond between a nonmetal and a nonmetal is called a(n)

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

transfer bond

8.
Elements combine to form __________.
a)
compounds
b)
atoms
c)
positive ions
d)
negative ions
9.
What part of an atom is involved in chemical bonding?
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
10.
The chemical formula shows one carbon atom bonded to __________ oxygen atoms.
a)
one
b)
two
c)
three
d)
four
11.
In an electron dot diagram, two pairs of shared electrons represents a ...
a)
single bond
b)
double bond
c)
triple bond
d)
quadruple bond
12.
A Nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?
a)
1
1
b)
3
c)
4
d)
6
13.

How many outermost shell electrons does nitrogen have?

a)
3
b)

2

c)
5
d)
1
14.

What is the basis of a metallic bond?

a)

the attraction of neutral metal atoms.

b)

the attraction between protons and neutrons.

c)

the attraction between positive metal ions and interlocking electrons.

d)

the attraction between positive metal ions and delocalized electrons.

15.
At room temperature, most metals are
a)
liquid
b)
solid
c)
gas
d)
an alloy
16.

Why does the melting point of metals increase across period 3, from Sodium (Na) to Aluminium (AI)?

a)

Size of atoms gets smaller

b)

Attraction force between nuclei and free electron increases

c)

Increased space between the outermost electrons in the "sea"

d)

Increased number of outermost electrons contributed to the "sea"

17.
I can hit a metal with a hammer without the metal shattering because of its __________.
a)
Ductility
b)
Malleability
c)
Conductivity
d)
Lustrousness
18.
Earth's current atmosphere is
a)
78% nitrogen, 21% oxygen, 0.9% argon and 0.037% carbon dioxide
b)
78% oxygen, 21%nitrogen, 0.9% argon, 0.037% carbon dioxide
c)
78% nitrogen, 21% argon, 1% oxygen
d)
78% oxygen, 21% nitrogen, 1% carbon dioxide
19.

H2

a)

Element

b)

Compound

c)

Mixture

20.

MgCl2

a)

Element

b)

Compound

c)

Mixture

21.
a)

Element

b)

Compound

c)

Mixture

22.
a)

Element

b)

Compound

c)

Mixture

23.
a)

Element

b)

Compound

c)

Mixture

24.
a)

Element

b)

Compound

c)

Mixture

25.
a)

Element

b)

Compound

c)

Mixture

26.
a)

Element

b)

Compound

c)

Mixture

27.
a)

Element

b)

Compound

c)

Mixture

28.
How do you test for hydrogen gas?
a)
Relight a glowing splint
b)

Makes a pop sound with a burning splint

c)
Turns limewater milky
d)

Bleaches limtus paper

29.
How do you test for oxygen gas?
a)

Makes a pop sound with a burning splint

b)
Relights a glowing splint
c)

Bleaches litmus paper

d)
Turns limewater milky
30.
How do you test for carbon dioxide gas?
a)
Turns limewater milky
b)
Relights a glowing splint
c)

Makes a pop sound with a burning splint

d)

Bleaches litmus paper

31.

Which component of air is liquid at -70C but will come out solid at -80C?

a)

Carbon monoxide

b)

Dihydrogen monoxide

c)

Carbon dioxide

d)

Hydrogen

32.

WE can liquify the components of air by-

a)

increasing the pressure and increasing the temperature

b)

increasing the pressure and decreasing the temperature

c)

Decrease both temperature and pressure

d)

None of these methods

33.

Hot compressed air is then cooled by-

a)

Ice

b)

Liquid nitrogen

c)

cool water

d)

Neon

34.
Does air contains water vapour ?
a)
Yes 
b)
No
35.
Is air a mixture or compound ?
a)
mixture 
b)
compound

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