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Assertion (A) The highest oxidation stat...

Assertion (A) The highest oxidation state of osmium is +8.
Reason (R ) Osmium is a 5d-block element.

A

Both assertion and reason are true and reason is the correct explanation of the assertion .

B

Both assertion and reason are true but reason is not the correc explanation of assertion.

C

Assertion is not true for reason is true

D

Both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
b
Correct explanation. Osmium has the electronic configuration `5d^(6) 6s^(2) `. As 5d and 6s are close in energy , all the 8 electrons can participate in bonding.
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