Q10 of 21 Page 28

Classify the following into elements, compounds and mixtures.

(a) Sodium


(b) Soil


(c) Sugar solution


(d) Silver


(e) Calcium carbonate


(f) Tin


(g) Silicon


(h) Coal


(i) Air


(j) Soap


(k) Methane


(l) Carbon dioxide


(m) Blood






































Elements



Compounds



Mixtures



Sodium (Na)



Calcium Carbonate (CaCo3)



Soil



Silver (Ag)



Methane



Sugar Solution



Tin (Pb)



Carbon dioxide (CO2)



Coal



Silicon (Si)




Air





Soap





Blood




More from this chapter

All 21 →
7

Which of the following materials fall in the category of a "pure substance"?

(a) Ice


(b) Milk


(c) Iron


(d) Hydrochloric acid


(e) Calcium oxide


(j) Mercury


(g) Brick


(h) Wood


(i) Air

 8

Identify the solutions among the following mixtures:

(a) Soil


(b) Sea-water


(c) Air


(d) Coal


(e) Soda water

 9

Which of the following will show "Tyndall effect"?

(a) Salt solution


(b) Milk


(c) Copper sulphate solution


(d) Starch solution

 11

Which of the following are chemical changes?

(a) Growth of a plant


(b) Rusting of iron


(c) Mixing of iron filings and sand


(d) Cooking of food


(e) Digestion of food


(j) Freezing of water


(g) Burning of a candle