What is meant by a pure substance?

Important Questions on Is Matter Around us Pure

EASY

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 2

What type of mixtures are separated by the technique of crystallisation?

EASY

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 3

Define:

(a) Solute

(b) Solvent

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 4

Why alloy is considered as a mixture?

EASY

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 5

Define solution?

EASY

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 6

Why air is considered as a mixture?

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 7

Why is it said that solubility of any solute changes with a change in temperature?

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 8

Why is Tyndall effect not observed when light passes through a true solution or suspension?

MEDIUM

9th CBSE

IMPORTANT

EVERGREEN Self-Study in SCIENCE>Chapter 2 - Is Matter Around us Pure>CHAPTER TEST>Q 9

Why cream separates from milk on churning?