Question

Which of the following compounds is not colored yellow?

• A. $Zn_2[Fe(CN)_6]$
• B. $K_3[Co(NO_2)_6]$
• C. $(NH_4)_3 [As (MO_3O_{10})_4]$
• D. $BaCrO_4$

Answer 1

Answer: (A)

$Zn_2[Fe(CN)_6]$

Answer 2

(1) $\left( NH _{4}\right)_{3}\left[ As \left( Mo _{3} O _{10}\right)_{4}\right]=$ Yellow

(2) $BaCrO _{4}=$ Yellow

(3) $Zn _{2}\left[ Fe ( CN )_{6}\right]=$ White

(4) $K _{3}\left[ Co \left( NO _{2}\right)_{6}\right]=$ Yellow