Grade 8 Chemistry Question Preview (ID: 53100)
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Separation techniques involve:
a) Physical change
b) Chemical change
c) Combination of two substances
d)
Decomposition of water is a:
a) Physical change.
b) Chemical change.
c) Combination of hydrogen and oxygen
d)
Sulfur is a:
a) Mixture
b) Element
c) Compound
d)
Sulfur dioxide is a:
a) Mixture
b) Element
c) Compound
d)
Salt water is a:
a) Mixture
b) Element
c) Compound
d)
Sugar is a carbohydrate composed of the elements:
a) Carbon, Hydrogen and Nitrogen
b) Carbon, Hydrogen and Oxygen.
c) Carbon, Hydrogen and water.
d)
Salt is a:
a) Solution
b) Mixture
c) Pure substance.
d)
Color is a:
a) Physical constant.
b) Chemical constant.
c) Physical property.
d)
Density is a:
a) Physical constant.
b) Chemical constant.
c) Physical property.
d)
Drinking water and Air are:
a) Elements
b) Compounds
c) Mixtures
d)
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