What are the products formed when an aqueous solution of $CuCl_2$ and $(NH_4)_2S$ are mixed?
- A$CuS$ $(aq.)$ and $NH_4Cl$ $(s)$
- B$CuS$ $(s)$ and $NH_4Cl$ $(aq.)$
- C$CuS$ $(aq.)$ and $NH_4Cl$ $(g)$
- D$CuS$ $(s)$ and $NH_4Cl$ $(s)$
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