Q50 / 180 · AIIMS 2007 · Chemistry

Assertion : Ozone is an allotrope of oxygen. Reason : Oxygen is bluish colour liquid and in singlet state it is more paramagnetic.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • Correct answer
    C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

Oxygen is a colourless, odourless and tasteless gas. It is paramagnetic in gaseous, liquid and solid states. It can be liquefied to a pale blue liquid by compressing the gas at a very low temperature. Its allotropic modification is ozone.

Hence, the correct answer is option: 'C'.

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