Matter is made of one or more components known as substances.
A substance is a kind of matter which cannot be separated into any other types of matter by some physical means.
Such a substance which has only one component and nothing else in it is called a pure substance.
Substances are mostly mixed with one another and their combination is known as mixture.
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What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Which of the following materials fall in the category of a “pure
(d) Hydrochloric Acid
(e) Calcium oxide
Classify the following into elements, compounds and mixtures:
(c) Sugar solution
(e) Calcium carbonate
(l) Carbon dioxide