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General Science MCQ


When pressure is increased, then the melting point of ice:

  • Increases
  • Decreases
  • Remains unchanged
  • Depends on the impurities in the ice
  • Correct Option: B  [ Decreases ]

    Remark:

The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organism is:

  • 4-6
  • 2-4
  • 8-10
  • 12-16
  • Correct Option: A  [ 4-6 ]

    Remark:

Cobalt-60, commonly used in radiation therapy, emits :

  • Alpha rays
  • Beta rays
  • Gamma rays
  • X-rays
  • Correct Option: C  [ Gamma rays ]

    Remark:

In a forest ecosystem, green plants are

  • the primary producers.
  • the secondary consumers.
  • the decomposers.
  • both secondary consumers and decomposers.
  • Correct Option: A  [ the primary producers. ]

    Remark: The green plant in the ecosystem are called producers. In a terrestrial ecosystem, major producers are herbaceous and woody plants. Likewise, producers in an aquatic ecosystem are various species like phytoplankton, algae and higher plants.

Who discovered Electron?

  • Enrico Fermi
  • Robert Noyce
  • J.J.Thomson
  • James Dyson
  • Correct Option: C  [ J.J.Thomson ]

    Remark:

Which of the following will not cause any atmospheric pollution ?

  • Hydrogen
  • Sulphur dioxide
  • Carbon dioxide
  • Carbon monoxide
  • Correct Option: A  [ Hydrogen ]

    Remark:

Sound waves having frequency less than 20 Hz are called __________ waves.

  • Intelligent
  • Inferior
  • Infrasonic
  • Instrumental
  • Correct Option: C  [ Infrasonic ]

    Remark:

Which of the following is chiefly present in LPG?

  • Methane
  • Ethane
  • Propane
  • Butane
  • Correct Option: D  [ Butane ]

    Remark:

Which of the following animals is carnivorous?

  • Elephant
  • Horse
  • Rhinoceros
  • Tiger
  • Correct Option: D  [ Tiger ]

    Remark:

An instrument used for measuring depth of an ocean is called?

  • Hydrometer
  • Hygrometer
  • Fathometer
  • Galvanometer
  • Correct Option: A  [ Hydrometer ]

    Remark:

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