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Topic 2.6
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1
What two elements chemically react to form ammonia?
A)sodium and oxygen
B)nitrogen and hydrogen
C)hydrogen and oxygen
D)nitrogen and oxygen
2
Which of the following chemical compounds causes the most harm to the environment?
A)baking soda
B)water
C)sodium chloride
D)acid rain
3
How do you know when a chemical reaction has occurred between two pure substances?
A)The physical and chemical properties of the pure substances change.
B)The physical and chemical properties of the pure substances temporarily change.
C)The physical properties stay the same but the chemical properties change.
D)The physical properties change but the chemical properties do not change.
4
A disinfectant can be referred to as…
A)explosive.
B)harmless.
C)environmentally sensitive
D)poisonous
5
The term “CAUTION” written on the side of a household cleaner indicates that…
A)the product can cause temporary or permanent injury, or death.
B)very low exposure to the product can lead to death.
C)extreme exposure to the product can cause temporary injury, sometimes leading to death.
D)the product is safe to use with water.
6
What symbol is used by HHPS to indicate that a product is poison?
A)a flame
B)a skull and crossbones
C)a solid shape with smaller shapes around it and lines extending from it
D)the bones of a hand
7
What substance will improve the odour of some safe-to-use alternative cleaning products?
A)lemon juice
B)baking soda
C)water
D)vinegar





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