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AIIMS 2014
Exam
AIIMS
Year
2014
Subject
Chemistry
Chapter
Structure of Atom

AIIMS 2014 · Chemistry · Structure of Atom

Assertion: Co(IV) is known but Ni(IV) is not. Reason : Ni(IV) has...

Assertion: Co(IV)\mathrm{Co}(\mathrm{IV}) is known but Ni(IV)\mathrm{Ni}(\mathrm{IV}) is not. Reason : Ni(IV)\mathrm{Ni}(\mathrm{IV}) has d4d^4 electronic configuration.Assertion: Co(IV) is known but Ni(IV) is not. Reason : Ni(IV) has d^4 electronic configuration.

Options

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

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

Both Co and Ni have (IV) oxidation state. Ni\mathrm{Ni} (IV) has 3d63 d^6 electronic configuration. Assertion: Co(IV) is known but Ni(IV) is not. Reason : Ni(IV) has d^4 electronic configuration.
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