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\[
\begin{array}{l}
\mathrm{H}_{3} \mathrm{AsO}_{4}+12\left(\mathrm{NH}_{4}\right)_{2} \mathrm{MoO}_{2}+21 \mathrm{HNO}_{3} \rightarrow \\
\text { Arsenic acid Ammonium } \\
\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]+21 \mathrm{NH}_{4} \mathrm{NO}_{3} \\
\end{array}
\]
\( \mathrm{P} \)
The colour of the precipitate in the above reaction is-
(1) Brown
(2) Yellow
(3) Green
(4) Red
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