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General Science MCQ - Multiple Choice Question and Answer

General Science MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 29
The hardest substance available on earth is

Platinum
Quartz
gold
Diamond

Question No : 30
When a gas is turned into a liquid, the process is called

evaporation
condensation
sublimation
deposition

Question No : 31
Rust is

A mixture of FeO and Fe(OH)2
A mixture of Fe2O3 and Fe(OH)2
A mixture of Fe2O3, 3H2O and FeO
FeO only

Question No : 32
Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called

Carbon Monoxide
Phosgene
Phosphine
None of these

Question No : 33
Pollination by birds is called

autogamy
entomophily
anemophily
ornithophily

Question No : 34
The location and energy of an electron in an atom can be specified by

Atomic number
Atomic mass
Quantum numbers
None of these

Question No : 35
Old-written material, which cannot be read easily can be read by

None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays