Assertion :The difference in the successive oxidation states exhibited by transition elements is unity only Reason: d orbitals of transition elements are incompletely filled

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The difference in the successive oxidation states exhibited by transition elements is unity only.
d orbitals of transition elements are incompletely filled.
Note: For 3d transition series, 4s and 3d electrons are available for chemical bonding. Hence, in addition to +1 and +2 oxidation states, there are as many oxidation states as the number of 3d electrons.

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