Gate Way To CGL Mains : 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

ANSWER KEY:
1 - (D)
2 - (C)
3 - (C)
4 - (D)
5 - (C)
6 - (C)
7 - (A)
8 - (B)
9 - (B)
10- (D)