Identify correct statements from below: A. The chromate ion is sq… - Vidyadip

MCQ

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
✓
B, D, E only

✓

Answer

Correct option: D.

B, D, E only

(D)
A. $CrO _4{ }^{2-}$is tetrahedral
B. $2 Na _2 CrO _4+2 H ^{+} \rightarrow Na _2 Cr _2 O _7+2 Na ^{+}+ H _2 O$
C. As per NCERT, green manganate is paramagnetic with 1 unpaired electron.
D. Statement is correct
E. Statement is correct

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