Question

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

Answer 1

Answer:

homogenous are that which can be separated with hand

heterogenus can't be separated with hand

substances --. mixture of particles

Answer 2

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

Homogeneous mixture Heterogeneous mixture

(I) Homogeneous mixtures have uniform composition throughout the mixture.

(II) The whole mixture is in same phase.

(III) Components are not visible to the naked eye.

(IV) Components cannot be separated easily.

Eg.: Sugar + Water → Sugar solution (I) Heterogeneous mixture have composition which may vary from point to point.

(II) Substances can be of two phases and layers may separate.

(III) Component of mixture can be seen easily.

(IV) Components can be separated easily.

Eg.: Salt + Sand.

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