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Chemistry - 9 Chapter - 2
Chemical combination and Chemical Equations
Test - 12
1.
A complete and balanced equation tells us the Mole Relio between reactants and products?
a) False
b) True
2.
A complete and balanced equation tells us the Molar Mass ratio between the reactants and products.
a) False
b) True
3.
A physical change is temporary change and can be reversed easily.
a) True
b) False
4.
A chemcial charge is a permanent change and can not be easily reversed.
a) True
b) False
5.
Evaporation of water is a chemical change.
a) True
b) False
6.
Lime stone reacts with dilute sulphuric acid to endve CO
2
in the form of ?
a) Liquid
b) Effervescence.
c) Gas
d) Solid
7.
In displacement reaction a more reactive metal can displace a less reactive matel from its compound.
a) False
b) True
8.
Double displacement reections are used to prepare______?
a) All type of salts
b) Insoluble salts
c) Soluble salts.
d) None is correct.
9.
In addition reaction two different compounds or elements react to give only one compound.
a) True
b) False
10.
Some compounds may decompose into elements or smallar compounds upon heating. The process is called?
a) Two answers are correct
b) Desolving Reaction
c) Desolution Reaction
d) Decomposition Reaction
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