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Download in pdf Chemistry multiple choice questions(mcqs) & answers. These general awareness quiz objective questions answers include mcqs on Wax, Ultra violet radiation etc.
(31)
When there are two electrons in the same orbital, they have:
[A]
same spin
[B]
opposite spin
[C]
Same or opposite spin
[D]
no spin
Comment
(32)
Wax is chemically a mixture of
[A]
aliphatic hydrocarbon
[B]
cyclic hydrocarbon
[C]
aromatic hydrocarbon
[D]
aliphatic and aromatic hydrocarbon
Comment
(33)
Ultra violet radiation striking the earth is due to the depletion of
[A]
oxygen
[B]
ozone
[C]
carbon dioxide
[D]
carbon monoxide
Comment
(34)
Galvanisation is the
[A]
deposition of aluminium on iron
[B]
deposition of copper on iron
[C]
deposition of tin on iron
[D]
deposition of zinc on iron
Comment
(35)
What is the most commonly used substance in fluorescent tubes
[A]
Sodium vapour and Neon
[B]
Sodium oxide and Argon
[C]
Mercury vapour and Argon
[D]
Mercury oxide and Neon
Comment
(36)
Which of the following gas is chiefly present in LPG (liquefied petroleum gas)
[A]
Butane
[B]
Propane
[C]
Ethane
[D]
Methane
Comment
(37)
Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid
[A]
Methyl red
[B]
Methyl orange
[C]
Methylene blue
[D]
Phenolphthaline
Comment
(38)
Bauxite is an alloy of which of the following metals?
[A]
Iron
[B]
Tin
[C]
Silver
[D]
Aluminium
Comment
(39)
Cement is made hard with
[A]
dehydration
[B]
polymerization
[C]
dissociation of water
[D]
hydration and dissociation of water
Comment
(40)
Table salt get moist during rainy season because
[A]
Sodium chloride is deliquescent
[B]
Sodium chloride is hydroscopic
[C]
Sodium chloride contains some quantity of Sodium iodide
[D]
Sodium chloride contains hydroscopic impurities like magnesium chloride
Comment
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