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Question is attached... {ALTS-10 Q57}

Question is attached...
 
{ALTS-10  Q57}

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Grade:12th pass

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
9 years ago
ANS(1)
In (CrO4)2-
We first find the charge on Cr.
Let the charge of Cr be x.
x-4(2)= -2
x-8= -2
x=+6

From the cofiguration of Cr, if we remove 6 electrons to find configuration of Cr+6
The configuration is 1s2, 2s2, 2p6, 3s2, 3p6

Electrons are not present in d-orbital, therefore, it's color is not due to d-d- transition

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