set 1 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) Non-metals are non-lustrous with dull apppearence. Graphite, an allotrope of carbon and iodine have shining lustrous surfaces.
(b) Non-metals are of two types only solids and gases.
(c) Non-metals reacts with oxygen to form basic oxides generally.
(d) Non-metals replace hydrogen from acids.
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
Heaviest metal of the following is made of
a) Uranium
b) Aluminium
c) Copper
d) Silver
Answer »Answer: (a)
Question : 2
Which of the following is not an ore?
a) Zinc blende
b) Bauxite
c) Malachite
d) Pig iron
Answer »Answer: (d)
Pig iron ⟶ It is the most impure form of iron and contains the highest proportion of carbon (2.5–4%).
Rest all are ore.
Malachite ⟶ Cu(OH)2 CuCO3,
Zinc blende ⟶ ZnS, Bauxite ⟶ Al2O3 2H2O
Question : 4
Which of the following have low melting and boiling points?
a) Iron
b) Phosphorus
c) Sodium
d) Both (b) and (c)
Answer »Answer: (d)
Phosphorus is a non-metal and non-metals have low melting and boiling points.
Although sodium is a metal, it has low melting and boiling point.
Question : 5
Pure gold is –
a) 20 carats
b) 24 carats
c) 22 carats
d) 18 carats
Answer »Answer: (b)
Question : 6
Deionised water is produced by
a) Ion-exchange resin process
b) Clark’s process
c) Calgon process
d) Permutit process
Answer »Answer: (a)
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