Question

Identify correct statements from below:
A. The chromate ion is square planar. 
B. Dichromates are generally prepared from chromates. 
C. The green manganate ion is diamagnetic. 
D. Dark green coloured \(K_2​MnO_4\)​ disproportionates in a neutral or acidic medium to give permanganate. 
E. With increasing oxidation number of transition metal, ionic character of the oxides decreases. 
Choose the correct answer from the options given below:

• A. B, C, D only
• B. A, D, E only
• C. A, B, C only
• D. B, D, E only

Answer 1

The Correct Option is D

A. \( \text{CrO}_4^{2-} \) is tetrahedral.

B. \( 2\text{Na}_2\text{CrO}_4 + 2\text{H}^+ \rightarrow \text{Na}_2\text{Cr}_2\text{O}_7 + 2\text{Na}^+ + \text{H}_2\text{O} \)

C. As per NCERT, green manganate is paramagnetic with 1 unpaired electron.

D. Statement is correct.

E. Statement is correct.