Objective General Knowledge

Q. The most inexpensive and commonly used variety of glass is called soda glass. it is called so because it
1 was used initially for making bottles for soda(Carbonated drink)
2 is made using soda(Sodium carbonate)
3 was initially used for storing sodium carbonate
4 is made using soda lime
Ans: 2

Q. The most important ore of aluminium is
1 bauxite
2 magnetite
3 haematite
4 monazite
Ans: 1

Q. The most electropositive elements among the following is
1 Na
2 Ca
3 K
4 Cs
Ans: 4

Q. The most electronegative element among sodium, bromium, fluorine and oxygen is
1 sodium
2 bromium
3 fluorine
4 oxygen
Ans: 3

Q. The most commonly used bleaching agent is
1 alcohol
2 carbon dioxide
3 chlorine
4 sodium chloride
Ans: 3

Q. The most abundant rare gas in the atmosphere is
1 He
2 Ne
3 Ar
4 Xe
Ans: 3

Q. The molecular formula of phosphorus is
1 p1
2 p2
3 p3
4 p4
Ans: 2

Q. The method that cannot be used for removing permanent hardness of water is
1 adding sodium carbonate
2 distillation
3 adding caustic soda
4 boiling
Ans: 4

Q. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
1 Liquation
2 Leaching
3 Levigation
4 Magnetic Separation
Ans: 3

Q. The metal that is usually extracted from sea water is
1 Ca
2 Na
3 K
4 Mg
Ans: 4