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Free download PDF of General knowledge(gk) multiple choice questions(mcqs) and answers on Chemistry. These general awareness quiz objective questions answers include mcqs on nitroglycerine, dry cell, mixed fertilizer etc.
(21)
Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines ?
[A]
methane and air
[B]
oxygen and acetylene
[C]
hydrogen and oxygen
[D]
carbon dioxide with ethane
Comment
(22)
In an atom, the order of filling up of the orbitals is governed by
[A]
Hund’s rule
[B]
Aufbau’s principle
[C]
Heisenberg’s uncertainly principle
[D]
Pauli’s exclusion principle
Comment
(23)
In a dry cell (battery), which of the following are used as electrolytes ?
[A]
Ammonium chloride and Calcium chloride
[B]
Magnesium chloride and Zinc chloride
[C]
Sodium chloride and Calcium chloride
[D]
Ammonium chloride and Zinc chloride
Comment
(24)
Which one of the following is a mixed fertilizer ?
[A]
CAN
[B]
Urea
[C]
NPK
[D]
Ammonium sulphate
Comment
(25)
Consider the following statements: Cook is one of the materials of the charge added to blast furnace for the production of steel / iron. Its function is to
Of these statements
I. act as the reducing agent
II. remove silica associated with the iron ore
III. function as fuel ; to supply heat
IV. act as an oxidizing agent
[A]
I and II are correct
[B]
II and IV are correct
[C]
I and III are correct
[D]
III and IV are correct
Comment
(26)
An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
[A]
dialysis
[B]
hydrolysis
[C]
photolysis
[D]
electrolysis
Comment
(27)
Which are the materials generally employed as solder in soldering operations in electronics ?
[A]
Lead and tin
[B]
Iron and tin
[C]
Aluminium and iron
[D]
Aluminium and lead
Comment
(28)
What are Rubies and Sapphires chemically known as ?
[A]
Lead tetroxide
[B]
Silicon dioxide
[C]
Boron nitride
[D]
Aluminium oxide
Comment
(29)
Which one of the following is another name of RDX ?
[A]
Cyclonite
[B]
Cyclohexane
[C]
Cyanohydrin
[D]
Dextran
Comment
(30)
Which one of the following is used as an explosive ?
[A]
Graphite
[B]
Nitroglycerine
[C]
Mercuric oxide
[D]
Phosphorus trichloride
Comment
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