Question

write five differences between a mixture and a compound

Answer 1

Compounds

1. Compounds are pure substances.

2. They are made up of two or more elements combined chemically.

3. The constituents of a compound are present in a fixed ratio.

4. Compounds have fixed properties. For example, a particular compound will have fixed temperatures at which it melts and boils.

5. A compound can have properties different from its constituents, as a new substance is formed when the constituents are chemically combined.

6. The constituents of a compound can be separated only by chemical methods.

Mixtures

1. Mixtures are impure substances.

2. They are made up of two or more substances mixed physically.

3. The constituents of a mixture are present in varying ratios.

4. Mixtures do not have fixed properties. Their properties depend on the nature of their compo­nents and the ratios in which they are combined.

5. In mixtures, no new substance is formed. The properties of a mixture are the same as the properties of its constituents.

6. The constituents of a mixture can be separated easily by physical methods.

Answer 2

Mixture -
1. Elements or compounds just mix together to form a mixture and no new compound is formed.
2. A mixture has a variable composition.
3. A mixture shows the properties of the constituent substances.
4. The constituents can be separated fairly easily by physical methods.

Compounds -
1. Elements react to form new compounds.
2. The composition of each new substance is always fixed.
3. The new substance has totally different properties.
4. The constituents can be separated only by chemical or electrochemical reactions.
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