Chemistry Quiz

Chemistry Quiz

1.The metal that is usually extracted from sea water is
A.Ca
B.Na
C.K
d.Mg

2.The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
A.liquation
B.leaching
c.levigation
D.magnetic separation

3.The National Chemical Laboratory is situated in
A.New Delhi
B.Bangalore
c.Pune
D.Patna

4.The hottest part of the gas flame is known as
A.luminous zone
B.dark zone
C.blue zone
d.non-luminous zone

5.The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
A.carbon
B.hydrogen
c.oxygen
D.nitrogen

6.The main active constituent of tea and coffee is
A.nicotine
B.chlorophyll
c.caffeine
D.aspirin

7.The gas used in the manufacture of vanaspati from vegetable oil is
a.hydrogen
B.oxygen
C.nitrogen
D.carbon dioxide

8.The first metal used by man was
A.iron
b.copper
C.gold
D.bronze

9.Freon Gas is used in
A.Air-conditioners
b.Refrigerators
C.Television
D.Nuclear reactors

10.The preparation of soap involves the process called
A.Neutralization
B. Esterification
C.Hydrolysis
d.None of these

11. The gas used to extinguish fire is —
(A) Neon
(B) Nitrogen
(c) Carbon dioxide
(D) Carbon Monoxide

12. In which of the following activities Silicon Carbide is used ?
(A) Making cement and glass
(B) Disinfecting water and ponds
(C) Making castes for statues
(d) Cutting very hard substances

13. The element common to all acids is —
(A) Oxygen
(b) Hydrogen
(C) Nitrogen
(D) Sulphur

14. Gobar gas contains mainly —
(a) Methane
(B) Carbon dioxide
(C) Butane
(D) Carbon Monoxide

15. The most malleable metal is —
(A) Silver
(b) Gold
(C) Aluminium
(D) Sodium

16. Tetraethyl lead is used as —
(A) Mosquito repellent
(B) Pain Killer
(C) Fire extinguisher
(d) Petrol additive

17. Which of the following is used in beauty parlours for hair setting ?
(A) Phosphorus
(b) Sulphur
(C) Chlorine
(D) Silicon

18. Which of the following is a non-metal that remains liquid in room temperature ?
(a) Bromine
(B) Chlorine
(C) Helium
(D) Phosphorus

19. From which mineral is radium obtained —
(A) Limestone
(B) Haematitie
(c) Pitchblende
(D) Rutile

20. What is laughing gas ?
(A) Carbon dioxide
(B) Sulphur dioxide
(C) Nitrogen Dioxide
(d) Nitrous oxide

ANSWERS:
1 - (D) 2 - (C) 3 - (C) 4 - (D) 5 - (C) 6 - (C) 7 - (A) 8 - (B) 9 - (B) 10- (D) 11 - (C) 12 - (D) 13- (B) 14- (A) 15- (B) 16- (D) 17- (B) 18 - (A) 19 - (C) 20 - (D)