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) Bromine
(b) Fluorine
(c) Chlorine
(d) Iodine
The correct answers to the above question in:
Answer: (d)
Iodine is a sublime substance
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Read more chemistry gk Based General Science Questions and Answers
Question : 1
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 : 2
The metal used to built bridges is
a) platinum
b) gold
c) silver
d) iron
Answer »Answer: (d)
Steel an alloy of iron and carbon is used for manufacturing bridges.
Question : 3
Which one of the following elements cannot displace hydrogen gas from a dilute acid?
a) Copper
b) Magnesium
c) Zinc
d) Iron
Answer »Answer: (a)
Question : 4
Removal of impurities from ore is known as -
a) calcination
b) crushing and grinding
c) concentration of ore
d) roasting
Answer »Answer: (c)
Question : 5
Which one of the following is the correct order in which the gases H2, Ne, O2 and N2 are evolved on fractional distillation of liquid air?
a) H2, Ne, N2, O2
b) N2, O2, Ne, H2
c) H2, Ne, O2, N2
d) O2, N2, H2, Ne
Answer »Answer: (a)
Question : 6
The chief ore of aluminium is
a) alunite
b) bauxite
c) cryolite
d) feldspar
Answer »Answer: (b)
Bauxite is Al2O3 .2H2O.
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