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Question
Which one of the following is a pure substance?
Which one of the following is a pure substance?
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Solution
The correct option is A Iron
Pure substances are made of only one kind of particles.
Iron is made up of only one kind of particles, that is, iron particles. Therefore, it is a pure substance.
Tea is made up of milk, sugar and tea leaves. Air is made of many gases such as nitrogen, oxygen, carbon dioxide, etc. Soda is made up of water, sugar and carbon dioxide.
Since tea, air and soda are made up of different kinds of particles, they are not classified as pure substances.
Pure substances are made of only one kind of particles.
Iron is made up of only one kind of particles, that is, iron particles. Therefore, it is a pure substance.
Tea is made up of milk, sugar and tea leaves. Air is made of many gases such as nitrogen, oxygen, carbon dioxide, etc. Soda is made up of water, sugar and carbon dioxide.
Since tea, air and soda are made up of different kinds of particles, they are not classified as pure substances.
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