Which of the following compounds is not coloured yellow?

A
${Zn}_{2} [Fe (CN)_{6}]$
B
$K_{3} [Co {({NO}_{2})}_{6}]$
C
${({NH}_{4})}_{3} [As {({Mo}_{3} O_{10})}_{4}]$
D
${BaCrO}_{4}$

Solution:

The compound ${Zn}_{2} [Fe (CN)_{6}]$ is white while the remaining three compounds are yellow. Hence the correct option is A.

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