Prelim Past Questions

Prelim Past questions – Chemical Earth.
1.

What is the systematic name for a compound with the formula Cu2SO4?
(A)
(B)
(C)
(D)

3.

In which compound do all atoms have the same electronic configuration?
(A)
(B)
(C)
(D)

4.

Copper sulfide
Copper (I) sulfate
Copper (II) sulfate
Copper disulfate

LiF
NaCl
MgF2
NCl3

Identify the property which decreases across each row of the Periodic Table.
(A)
(B)
(C)
(D)

Melting point
Ionisation energy
Valency
Atomic radius

11. Which is correct in describing diamond, graphite and fullerenes?
(A)
(B)
(C)
(D)
13.

All have similar physical properties but different chemical compositions.
All have the same chemical composition but different physical properties.
1

.............................................................................................................................................
.............................................................................................................................................
(b) valency ...........................................................................................................................

1

.............................................................................................................................................
.............................................................................................................................................
(c) electrical conductivity ....................................................................................................
.............................................................................................................................................

1

2010
1
Which of the following correctly shows the most abundant element, by mass, in each region of Earth.
Lithosphere

Atmosphere