A) \[CrS{{O}_{4}}\]
B) \[C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]
C) \[{{K}_{2}}S{{O}_{4}}\]
D) \[S\]
Correct Answer: A
Solution :
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}+4{{H}_{2}}S{{O}_{4}}+3{{H}_{2}}S\xrightarrow[{}]{{}}{{K}_{2}}S{{O}_{4}}+C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]\[+7{{H}_{2}}O+3S\]
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