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Question

Assertion :[Fe(CN)6]3 has d2sp3 type hybridisation. Reason: [Fe(CN)6]3 ion shows magnetic moment corresponding to two unpaired electrons.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is C Assertion is correct but Reason is incorrect
[Fe(CN)6]3 has d2sp3 type hybridisation. Inner d orbital is used. Hence, the complex is inner orbital complex.
[Fe(CN)6]3 ion shows magnetic moment corresponding to one unpaired electron.
Fe3+ ion has 3d5 as outer electronic configuration. All five d electrons are in lower t2g energy level.
Assertion is correct but Reason is incorrect.

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