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AIIMS 2002
Exam
AIIMS
Year
2002
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

AIIMS 2002 · Chemistry · Classification of Elements and Periodicity in Properties

Assertion : Dinegative anion of oxygen (O^ 2- ) is quite common but...

Assertion : Dinegative anion of oxygen (O2−)\left(\mathrm{O}^{2-}\right) is quite common but dinegative anion of sulphur (S2−)\left(\mathrm{S}^{2-}\right) is less common. Reason : Covalency of oxygen is two.

Options

  1. AIf both the assertion and reason are true and reason is a correct explanation of the assertion.
  2. BIf both assertion and reason are true but assertion is not a correct explanation of the assertion.
  3. CIf the assertion is true but the reason is false.
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but assertion is not a correct explanation of the assertion.

Step-by-step solution

Oxygen is second most electronegative element after fluorine. So it can easily gain electrons to form dinegative anion (O2−)\left(\mathrm{O}^{2-}\right) while sulphur is not so electronegative element as oxygen.
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