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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 : 43
Polythene is industrially prepared by the polymerisation of

styrene
methane
ethylene
acetylene

Question No : 44
The type of glass used in making prisms and lenses is

Pyrex glass
Soft glass
Flint glass
Jena glass

Question No : 45
Which of the following characters is not shown by hydrogen

It burns in air to form water
It supports combustion
It readily combines with fluorine and chlorine
It combines with almost all metals forming hydrides

Question No : 46
The formula of Plaster of Paris is

2CaSO4, H2O
CaSO4
CaSO4, 2H2O
2CaSO4, 4H2O

Question No : 47
Cell membrane is

permeable
semipermeable
selectively permeable
impermeable

Question No : 48
The speed of light with the rise in the temperature of the medium

Increases
Remains unaltered
Drops sharply
Decreases

Question No : 49
Water has maximum density at

0C
-4C
100C
4C