MEDIUM
9th Manipur Board
IMPORTANT
Earn 100

Explain why the following is an example of chemical change?

Burning of charcoal.

.

Important Questions on Pure Substances and Mixtures

MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>Let us answer these:>Q 2

Explain why the following is an example of chemical change?

Digestion of food.

MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>Let us answer these:>Q 3
What is meant by saying metals are malleable and ductile?
EASY
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>Let us answer these:>Q 4
Name one solid, one liquid, and one gaseous non-metal.
MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>Let us answer these:>Q 5

Classifying the following into elements, compounds and mixture.

Graphite, brass, chalk, air, petroleum, seawater, milk, zinc, sodium carbonate.

 

MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>Let us answer these:>Q 6
List three characteristics by which compounds can be distinguished from mixtures.
MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>EXERCISES>Q 1
What is sublimation? Give the difference between evaporation and sublimation.
MEDIUM
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>EXERCISES>Q 2
What are distillation and fractional distiilation?
EASY
9th Manipur Board
IMPORTANT
Science for Class 9>Chapter 2 - Pure Substances and Mixtures>EXERCISES>Q 3

Which separation technique will you use to separate the following?

Common salt from sea water.