DPP – 9S21

IS MATTER AROUND US PURE?

Q1. Difference between pure and impure, element and compound, compound and mixture?

Q2. Which of the following materials fall into the category of “pure substance”?

(a) Ice

(b) Milk

(d) Hydrochloric acid

(e) Calcium oxide

(f) Mercury

(g) Brick

(e) Wood

(f) Air.

Q3. Classify each of the following as a homogeneous or heterogeneous mixture.

{ soda water, wood, air, soil, vinegar, filtered tea. }

Q4. Classify the following into elements, compounds and mixtures.

(a) Sodium

(b) Soil

(d) Silver

(e) Calcium carbonate

(f) Tin

(g) Silicon

(h) Coal

(i) Air

(j) Soap

(k) Methane

(l) Carbon dioxide

(m) Blood

Q5. What is mixture? Differentiate between homogenous and heterogeneous mixtures with examples.

Q6. Differentiate between Solutions, Colloids and Suspension.