Question

1. What is meant by a substance?
2. List the points of differences
between homogeneous and
heterogeneous mixtures.
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Answer 1

Answer:

SUBSTANCE IS A PARTICULAR KIND OF MATTER WITH UNIFORM PROPERTIES

Explanation:

HOMOGENEOUS means same

HETEROGENEOUS means different

Answer 2

Answer:

1.A substance is a matter that has definite properties and composition.Every pure compound and element is a substance.

2.Homogenous mixture

• They have uniform composition
• The components of homogenous mixture are not physically distinct.
• They have no visible boundaries of separation between the constituents.
• Examples:Alloy,solution of salt in water etc..

Heterogenous mixture

• They have non-uniform composition.
• The components of heterogenous mixture are physically distinct.
• They have visible boundaries of separation between constituents.
• Examples: Mixture of sand and common salt,mixture of sand and water etc..

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