Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-conceptual-Hard-Class 12
Which of the following statements about the interconversion of chromate and dichromate ions is correct?
A
The chromate ion is tetrahedral, while the dichromate ion has a Cr–O–Cr bond angle of 126°.
B
Dichromate ions can only form under acidic conditions and cannot revert to chromate ions.
C
The oxidation states of chromium in chromate and dichromate ions are different.
D
Chromate ions are more stable than dichromate ions at all pH levels.
Correct Answer
Option A
Detailed Explanation
The chromate ion is indeed tetrahedral, and the dichromate ion consists of two tetrahedra sharing a corner, leading to a Cr–O–Cr bond angle of 126°. The other options contain misconceptions about their properties and stability.
Found an issue with this question?