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Download in pdf Chemistry multiple choice questions(mcqs) & answers. These general awareness quiz objective questions answers include mcqs on manganese dioxide, uranium etc.
(51)
Radioactive disintegration of uranium ultimately results in formation of
[A]
Lead
[B]
Radium
[C]
Thorium
[D]
Polonium
Comment
(52)
Metal are good conductor because
[A]
The molecules colloid very freely
[B]
They contain reflecting surface
[C]
They contain free electron
[D]
The molecules are very close to each other
Comment
(53)
Cloud is a colloidal dispersion of
[A]
Fog in a dispersion medium of water
[B]
Mist in a dispersion medium of air
[C]
Air in a dispersion medium of water
[D]
Water drops in a dispersion medium of air
(54)
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes
[A]
Sodium chloride
[B]
Borax
[C]
Saltpeter
[D]
Hydrogen peroxide
Comment
(55)
Impure camphor is purified by
[A]
Steam distillation
[B]
Sublimation
[C]
Fractional distillation
[D]
Fractional crystallization
Comment
(56)
Sour taste of ‘Coca Cola’ is due to the presence of
[A]
Formic acid
[B]
Acetic acid
[C]
Hydrochloric acid
[D]
Phosphoric acid
Comment
(57)
Which of the following is used to restore the colour of old oil-paintings?
[A]
Ozone
[B]
Hydrogen peroxide
[C]
Sodium peroxide
[D]
Barium peroxide
Comment
(58)
The cathode of a lead storage battery is made up of
[A]
Lead
[B]
Zinc
[C]
Lead oxide
[D]
Manganese dioxide
Comment
(59)
Heat resistant variety of glass is
[A]
Flint glass
[B]
Hard glass
[C]
Pyrex glass
[D]
None of these
Comment
(60)
The substance most commonly used as a food preservation is
[A]
Acetic acid
[B]
Tartaric acid
[C]
Sodium carbonate
[D]
Sodium salt of benzoic acid
Comment
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