Question

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

Answer 1

1.A particular kind of matter with uniform properties is known as substance.

2A homogeneous mixture is a mixture having a uniform composition throughout the mixture. For example, mixtures of salt in water, sugar in water, copper sulphate in water, iodine in alcohol, alloy, and air have uniform compositions throughout the mixtures. On the other hand, a heterogeneous mixture is a mixture having a non-uniform composition throughout the mixture. For example, composition of mixtures of sodium chloride and iron filings, salt and sulphur, oil and water, chalk powder in water, wheat flour in water, milk and water are not uniform throughout the mixtures.

Answer 2

1.A substance is matter which has a specific composition and specific properties.

2. A homogeneous mixture is a mixture having a uniform composition throughout the mixture.A heterogeneous mixture is a mixture having a non-uniform composition throughout the mixture.