Which of the following match is INCORRECT : | vedclass

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(A) The color of $Hg_2I_2$ (mercurous iodide) is yellow-green,but it is often categorized as yellow. However,$BiI_3$ (bismuth triiodide) is known to b

Vedclass · Accepted Answer

$Hg_2I_2 \rightarrow$ Green

Vedclass · Answer

(A) The color of $Hg_2I_2$ (mercurous iodide) is yellow-green,but it is often categorized as yellow. However,$BiI_3$ (bismuth triiodide) is known to be black in color. $Ag_2CrO_4$ (silver chromate) is brick red. $BaCrO_4$ (barium chromate) is yellow. All the given options are actually correct in terms of their characteristic colors. If this is a multiple-choice question where one must be incorrect,there might be a typo in the question source. Based on standard chemical properties,all these matches are correct.

Cations	Group reaction
$P \rightarrow Pb^{2+}, Cu^{2+}$	$(i)$ $H_2S$ gas in presence of dilute $HCl$
$Q \rightarrow Al^{3+}, Fe^{3+}$	$(ii)$ $(NH_4)_2CO_3$ in presence of $NH_4OH$
$R \rightarrow Co^{2+}, Ni^{2+}$	$(iii)$ $NH_4OH$ in presence of $NH_4Cl$
$S \rightarrow Ba^{2+}, Ca^{2+}$	$(iv)$ $H_2S$ in presence of $NH_4OH$

Which of the following match is $INCORRECT$ :

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