Exercise: General Science

Questions for: General Science

Which one of the following is the petroleum wax?
A:
Paraffin wax
B:
Jonoba wax
C:
Carnauba wax
D:
Bees wax
Answer: A
Paraffin wax is obtained from petroleum by dewaxing light lubricating oil stocks. It is used in candles, wax paper, polishes, cosmetics, and electrical insulators. It assists in extracting perfumes from flowers, forms a base for medical ointments, and supplies a waterproof coating for wood. In wood and paper matches, it helps to ignite the matchstick by supplying an easily vaporized hydrocarbon fuel.
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The type of glass used in making lenses and prisms is
A:
jena glass
B:
soft glass
C:
pyrex glass
D:
flint glass
Answer: D
No answer description is available. Let's discuss.
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Soap is a mixture of sodium or potassium salts of
A:
dicarboxylic acids
B:
monocarboxylic acids
C:
glycerol
D:
tricarboxylic acids
Answer: B
No answer description is available. Let's discuss.
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Gypsum is added to cement clinker to
A:
increase the tensile strength of cement
B:
decrease the rate of setting of cement
C:
facilitate the formation of colloidal gel
D:
bind the particles of calcium silicate
Answer: B
No answer description is available. Let's discuss.
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Paper is manufactured by
A:
Wood and resin
B:
Wood, sodium and bleaching powder
C:
Wood, calcium, hydrogen sulphite and resin
D:
Wood and bleaching powder
Answer: C
No answer description is available. Let's discuss.
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