question_answer

Acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution turns green when \[N{{a}_{2}}S{{O}_{3}}\] is added to it. This is due to the formation of

A)  \[CrO_{4}^{2-}\]                             

B)     \[C{{r}_{2}}{{(S{{O}_{3}})}_{3}}\]                            

C)     \[CrS{{O}_{4}}\]                              

D)     \[C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]