General Science - 8
106.
___________ is the mineral from which the metal is conveniently and
economically extracted.
Ans: Ore
107. Iron coated with tin is called _________
Ans: Tin plate
108. Who wrote the book De re Metallica?
Ans: Georg Agricole
109.
Bauxite and Cryolite are the main ores of ____________
Ans: Aluminium
110.
Sulphide ores are purified by _____________ process.
Ans: Froth Hoatation
111.
_________ is the process of heating the ore below its melting point in absence of air to remove volatile
impurities.
Ans: Calcination
112.
_________ is the impurity present in the ore.
Ans: Gangue
113.
Most abundant metal present in developed animals.
Ans: Calcium
114.
The atmosphere mainly consists of ________
Ans:
Nitrogen
115.
__________ is the central portion of earth.
Ans: Core
116.
Most abundant metal present in blood is __________
Ans: Potassium
117.
The elements which lose electrons in chemical reaction are called _________
Ans: Metals
118.
_________ is the best conductor of heat and electricity.
Ans: Silver
119.
_________ is the king of metals.
Ans: Gold
120.
_________ is the metal having lowest melting point.
Ans: Mercury
121. Iron coated with _________ is called galvanized
iron.
Ans: Zinc
122.
Compounds of _________ are used as cooling agents in refrigerators.
Ans: Flourine
PSC GENERAL SCIENCE QUESTIONS AND ANSWERS
11. MATHS (SOLVED IN STEPS) => HCF & LCM <> PROFIT AND LOSS <> PROBLEMS ON TRAINS <> Problems on Age <> Problems on Average
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