KP Boards - MCQs

Q Oxygen is not necessary for?

  • A Combustion
  • B Rusting
  • C Respiration
  • D Photosynthesis
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KP Boards Science - Class 6th Uploaded By: Safdar Ali

Q Carbon dioxide is used in?

  • A Soft drinks
  • B Fire Extinguishers
  • C Photosynthesis
  • D All of them
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KP Boards Science - Class 6th Uploaded By: Safdar Ali

Q Which is true for nitrogen?

  • A Used as dry ice
  • B Used as coolant
  • C Used in respiration
  • D Used in combustion
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KP Boards Science - Class 6th Uploaded By: Safdar Ali

Q What is the volume of oxygen and carbon dioxide in air?

  • A 21% carbon dioxide and 0.03% oxygen
  • B 0.03% carbon dioxide and 78% oxygen
  • C 78% carbon dioxide and 21% oxygen
  • D 0.03% carbon dioxide and 21% oxygen
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KP Boards Science - Class 6th Uploaded By: Safdar Ali

Q Inert gases are not used in:

  • A Electric bulbs
  • B Sign boards
  • C Photosynthesis
  • D Weather balloons
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KP Boards Science - Class 6th Uploaded By: Safdar Ali

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