General Science Questions and Answers

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Q1
Brass gets discoloured in air because of the presence of which of the following gases in air?
  • A Oxygen
  • B Hydrogen sulphide
  • C Carbon dioxide
  • D Nitrogen
Answer: Option B
Q2
Which of the following is a non metal that remains liquid at room temperature?
  • A Phosphorous
  • B Bromine
  • C Chlorine
  • D Helium
Answer: Option B
Q3
Which of the following is used in pencils?
  • A Graphite
  • B Silicon
  • C Charcoal
  • D Phosphorous
Answer: Option A
Q4
Which of the following metals forms an amalgam with other metals?
  • A Tin
  • B Mercury
  • C Lead
  • D Zinc
Answer: Option B
Q5
The gas usually filled in the electric bulb is
  • A nitrogen
  • B hydrogen
  • C carbon dioxide
  • D oxygen
Answer: Option A
Q6
Washing soda is the common name for
  • A Sodium carbonate
  • B Calcium bicarbonate
  • C Sodium bicarbonate
  • D Calcium carbonate
Answer: Option A
Q7
Quartz crystals normally used in quartz clocks etc. is chemically
  • A silicon dioxide
  • B germanium oxide
  • C a mixture of germanium oxide and silicon dioxide
  • D sodium silicate
Answer: Option A
Q8
Which of the gas is not known as green house gas?
  • A Methane
  • B Nitrous oxide
  • C Carbon dioxide
  • D Hydrogen
Answer: Option D
Q9
 Bromine is a
  • A black solid
  • B red liquid
  • C colourless gas
  • D highly inflammable gas
Answer: Option B
Q10
The hardest substance available on earth is
  • A Gold
  • B Iron
  • C Diamond
  • D Platinum
Answer: Option C

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