Q94 / 180 · AIIMS 2001 · Chemistry

Assertion : In some cases oxygen shows positive oxidation number though it is an electronegative element. Reason : Fluorine is more electronegative than oxygen.

  • Correct answer
    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.
  • C
    If Assertion is true but Reason is false.
  • D
    If Assertion is false but Reason is true.

Solution

Oxygen is the most electronegative element after fluorine. Therefore, in the compounds between oxygen and fluorine, oxygen is found to show positive oxidation state. e.g. $\mathrm{OF}_2$ : Oxygen difluoride. Oxidation state of oxygen here is +2 .

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

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