Which is the correct representation of the solubility product constant

1.	Which is the correct representation of the solubility product constant of \[A{{g}_{2}}Cr{{O}_{4}}\] [NCERT 1974, 75]
A.	\[{{[A{{g}^{+}}]}^{2}}\,[CrO_{4}^{-2}]\]
B.	\[[A{{g}^{+}}]\,\,[CrO_{4}^{-2}]\]
C.	\[[2A{{g}^{+}}]\,\,[CrO_{4}^{-2}]\]
D.	\[{{[2A{{g}^{+}}]}^{2}}\,\,[CrO_{4}^{-2}]\]
Answer» B. \[[A{{g}^{+}}]\,\,[CrO_{4}^{-2}]\]

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Which is the correct representation of the solubility product constant of \[A{{g}_{2}}Cr{{O}_{4}}\] [NCERT 1974, 75]

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