Answer sheet of S3 Chem Test 2 (12-13) p.1
Our Lady of the Rosary College
S3 Chemistry Test 2 (2012-2013)
Time allowed: 30 minutes
Full Mark: 40
Answer Sheet
Date: 23-04-2012
Name: ________________________
Class: 3____
Class no.______
Section A (10 marks)
1
2
3
4
5
C
D
D
A
D
6
7
8
9
10
A
B
B
D
D
Section B (30 marks)
1
(a) W: Boron, X: Carbon, Y: Magnesium, Z: Chlorine
(b) Y/Magnesium
(c)
i) YZ2 /MgCl2
ii) XZ4/ CCl4
(d) For MgCl2 : 24.3 + 2 × 35.5 = 95.3
For CCl4 : 12 + 4 × 35.5 = 154
2
(a) Permanganate ion
(b) Potassium ion
(c)
KMnO4
(d) Giant ionic structure
(e) It has high melting point and boiling point.
Since a lot of energy is require to break the strong ionic bond between the
potassium ion and permanganate ion.
Answer sheet of S3 Chem Test 2 (12-13) p.1
Answer sheet of S3 Chem Test 2 (12-13) p.2
3
(a) Calcium: Solid
Diamond: Solid
Sodium Chloride: Liquid
(b) Calcium: Conduct electricity. It has delocalized electrons.
Diamond: Cannot conduct electricity. It does not have delocalized electrons and
ions.
Sodium Chloride: Conduct electricity. It has delocalized ions.
4
(a)
(b)
(c)
Water and Carbon dioxide
End of Answer Sheet
Answer sheet of S3 Chem Test 2 (12-13) p.2