Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-conceptual-Hard-Class 12
Which of the following statements about the chromate and dichromate ions is correct?
A
The chromate ion has a tetrahedral structure, whereas the dichromate ion has two tetrahedra sharing a corner.
B
The oxidation state of chromium in chromate is +6, while in dichromate it is +5.
C
Chromate and dichromate ions cannot interconvert in aqueous solution regardless of pH.
D
Both chromate and dichromate ions exist as stable monomers in solution.
Correct Answer
Option A
Detailed Explanation
The chromate ion (CrO4^2-) indeed has a tetrahedral structure, while the dichromate ion (Cr2O7^2-) consists of two tetrahedra sharing a corner, with a Cr–O–Cr bond angle of 126°, as mentioned in the NCERT content.
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