General Science Questions and Answers

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Q11
The variety of coal in which the deposit contains recognisable traces of the original plant material is
  • A bitumen
  • B anthracite
  • C lignite
  • D peat
Answer: Option D
Q12
Tetraethyl lead is used as
  • A pain killer
  • B fire extinguisher
  • C mosquito repellent
  • D petrol additive
Answer: Option D
Q13
Which of the following is used as a lubricant?
  • A Graphite
  • B Silica
  • C Iron Oxide
  • D Diamond
Answer: Option A
Q14
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
  • A Argon
  • B Xenon
  • C Helium
  • D Krypton
Answer: Option C
Q15
The gases used in different types of welding would include
  • A oxygen and hydrogen
  • B oxygen, hydrogen, acetylene and nitrogen
  • C oxygen, acetylene and argon
  • D oxygen and acetylene
Answer: Option D
Q16
The property of a substance to absorb moisture from the air on exposure is called
  • A osmosis
  • B deliquescence
  • C efflorescence
  • D desiccation
Answer: Option B
Q17
In which of the following activities silicon carbide is used?
  • A Making cement and glass
  • B Disinfecting water of ponds
  • C cutting very hard substances
  • D Making casts for statues
Answer: Option C
Q18
The average salinity of sea water is
  • A 3%
  • B 3.5%
  • C 2.5%
  • D 2%
Answer: Option B
Q19
When an iron nail gets rusted, iron oxide is formed
  • A without any change in the weight of the nail
  • B with decrease in the weight of the nail
  • C with increase in the weight of the nail
  • D without any change in colour or weight of the nail
Answer: Option C
Q20
Galvanised iron sheets have a coating of
  • A lead
  • B chromium
  • C zinc
  • D tin
Answer: Option C

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