Question

1. Write notes on : pure and impure substances .
2. Write the properties of solution , colloid and suspension .
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Answer 1

Answer:

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Explanation:

1.A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds.

2.A solution is always transparent, light passes through with no scattering from solute particles which are molecule in size. The solution is homogeneous and does not settle out. ... If a suspension is allowed to stand the particles will separate out. A colloid is intermediate between a solution and a suspension.