Home Chemistry Co-ordinatios Compounds General A compound is made by mixing cobalt (III) ni…
Chemistry Co-ordinatios Compounds General Single Correct MCQ
Published on: August 13, 2026

A compound is made by mixing cobalt (III) nitrite and potassium nitrite solutions in the ratio of 1 : 3. The aqueous solution of the compound showed 4 particles per molecule whereas molar conductivity reveals the presence of six electrical charges. The formula of the compound is :

A
Co(NO2)3 . 2KNO2
B
Co(NO2)3 . 3KNO2
C
K3[Co(NO2)6]
D
K[Co(NO2)4]

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Text Solution

Verified by Experts
The correct answer is:
C

Co(NO2)3 + 3KNO2 K3[Co(NO2)6] 3K+ + [Co(NO2)6]3– (total six electric charge)

3 : 1 electrolyte.

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