Worksheetschemical reactions and equations
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
AB+CD->AC+BD
a)
Chemical combination
b)
Decomposition
c)
Displacement reaction
d)
Double displacement
2.
S+O2->
a)
SO2
b)
SO3
c)
SO
d)
2SO
3.
Zinc reaction with acid give which gas?
a)
O2
b)
H2
c)
Zn2
d)
K2
4.
Carbonate and bicarbonates reacts with acid releases which gas?
a)
CO
b)
H2O
c)
HO2
d)
CO2
5.
When silver chloride kept under sunlight the colour change is
a)
Blue
b)
Brown
c)
Grey
d)
White
6.
The composition of hydrogen and oxygen in water is
a)
1:2
b)
2:1
c)
1:3
d)
3:1
7.
When lead nitrate and potassium hydrade are mixed the colour of the precipitate is
a)
Blue
b)
Green
c)
Yellow
d)
Grey
8.
Loss of electron is
a)
Oxidation
b)
Reduction
c)
Redox
d)
None
9.
Reactions in which energy is absorbed isknown as
a)
Endothermic
b)
Exothermic
c)
Precipitation
d)
None
10.
Formula of calcium carbonate
a)
Caco2
b)
Caco4
c)
Caco3
d)
Ca2CO3
100 %
