set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on metals, non metals, minerals, ores, properties, uses topic of general science mcq
(a) H2, Ne, N2, O2
(b) N2, O2, Ne, H2
(c) H2, Ne, O2, N2
(d) O2, N2, H2, Ne
The correct answers to the above question in:
Answer: (a)
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Read more chemistry gk Based General Science Questions and Answers
Question : 1
Removal of impurities from ore is known as -
a) calcination
b) crushing and grinding
c) concentration of ore
d) roasting
Answer »Answer: (c)
Question : 2
Which of the following non-metals sublimes on heating ?
a) Bromine
b) Fluorine
c) Chlorine
d) Iodine
Answer »Answer: (d)
Iodine is a sublime substance
Question : 3
The process to heat the ore in the presence of excess supply of air below its melting point is called
a) smelting
b) roasting
c) calcination
d) liquation
Answer »Answer: (b)
Question : 4
The chief ore of aluminium is
a) alunite
b) bauxite
c) cryolite
d) feldspar
Answer »Answer: (b)
Bauxite is Al2O3 .2H2O.
Question : 5
Which of the following is an oxide ore?
a) Haematite
b) Bauxite
c) Cuprite
d) All of these
Answer »Answer: (d)
Bauxite – Al2O3
Haematite – Fe2O3
Cuprite – Cu2 O
Question : 6
Which of the following is mainly used for the production of Aluminium?
a) Lignite
b) Bauxite
c) Hematite
d) Magnetite
Answer »Answer: (b)
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