ICSE CHEMISTRY - PRACTICE PAPER 9
A) Name the following. 5M
i)
The electrolyte used in the electroplating of an article with Silver.
ii)
The basic gas which gives white dense fumes with HCl gas.
iii) The non-volatile acid formed when Conc.HNO3
reacts with Sulphur.
iv)
The acid salt formed when dil. H2SO4 is treated with
insufficient Sodium hydroxide.
v)
The most electronegative element.
B) Correct and rewrite the following
statements. 5M
i)
During an electrolysis process metal deposits at anode
ii)
Sulphuric acid is a monobasic acid.
iii)
Group I elements are least electropositive.
iv)
Ammonia gas turns Nessler’s reagent to red.
v)
Nitric acid reacts with Copper to produce Nitrogen dioxide.
C) Study the table given and answer the
following questions. 5M
At. No.
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
Element
|
A
|
D
|
E
|
G
|
J
|
L
|
M
|
Q
|
R
|
T
|
i) Identify
the Noble gas in the table.
ii) The
element which belongs to Group 2 and has 3 shells.
iii) The
element which shows a valency of 2-
.
iv) Which
one of the above elements has the highest Electron affinity?
v) The
element which has 3 valence electrons.
D)
A)Calculate the molecular weights of the following compounds: [3+2]
i)
Sodium carbonate ii)
Sulphuric acid iii)
Hydrated copper sulphate
B)
Calculate the percentage of Oxygen in Sodium hydroxide.
(At.Wt.
H-1, C-12, O-16, Na-23, S-32, Cu-64)
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