set 4 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) CaCN2
(b) NH4NO3
(c) Ca(CN)2
(d) Urea
The correct answers to the above question in:
Answer: (c)
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Read more chemistry gk Based General Science Questions and Answers
Question : 1
Mercury is basically used in thermometer devices because its especiality is
a) High liquidity
b) High circulation power
c) High density
d) High specific heat
Answer »Answer: (b)
Question : 2
Aluminium is used in thermite welding because -
a) aluminium is a strong oxidising agent
b) aluminium is a light metal
c) aluminium has more affinity for oxygen
d) aluminium is a reactive metal
Answer »Answer: (c)
Fe2O3 + 2Al(s) ⟶ Al2O3(s) + 2Fe(l)
Question : 3
Statement I:
Soaps do not form lather with water containing salts of calcium and magnesium.
Statement II:
Calcium and magnesium salts of long chain fatty acids are insoluble in water.
a) Both the statements are individually true but Statement II is not the correct explanation of Statement I.
b) Statement I is true, but Statement II is false.
c) Both the statements are individually true and Statement II is the correct explanation of Statement I.
d) Statement I is false, but Statement II is true.
Answer »Answer: (c)
Question : 4
Horn silver is
a) a carbonate ore of silver
b) an oxide ore of silver
c) a sulphite ore of silver
d) a chloride ore of silver
Answer »Answer: (d)
Chemical formula of horn silver is AgCl.
Question : 6
Sodium is obtained by the electrolysis of
a) fused sodium chloride
b) an aqueous solution of sodium chloride
c) an aqueous solution of sodium hydroxide
d) fused sodium sulphate
Answer »Answer: (a)
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