Question

(a) Name two properties of a substance to check its purity?
(b) Alloys cannot be separated by physical means, though it is considered mixture, Why?
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Answer 1

Answer:

acceleration is a vector quantity

Vector quantities refer to the physical quantities characterized by the presence of both magnitude as well as direction. For example, displacement, force, torque, momentum, acceleration, velocity, etc.

Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

Answer 2

Explanation:

A) A pure substance has a fixed melting point or boiling point at constant pressure. The purity of a substance can be tested by checking its melting point or boiling point.