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Section 4.3
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1
Which of the following is an example of a chemical property?
A)combustibility of propane
B)melting point of copper
C)boiling point of water
D)odour from natural gas
2
Chemical properties of a substance are exhibited…
A)as the substance allows electrical current to pass through it.
B)when a substance changes state.
C)during the melting of a substance.
D)during a chemical reaction.
3
Combustibility is the ability of a substance to…
A)react with acids.
B)react with water.
C)react with oxygen.
D)burn in air.
4
The toxic effects of DDT are intensified due to its…
A)combustibility
B)insolubility
C)stability
D)viscosity
5
The frequent use of hydrogen peroxide can…
A)strengthen the outer layer of hair.
B)darkens hair colour.
C)cause redness of the skin and irritation to the eyes.
D)change melanin into peroxide.





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