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

Answer: (D)

B, D, E only

Answer 2

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.