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NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
    Yellow colour of chromates changes to orange on acidiflcation due to the formation of

    A)  \[Cr{{O}_{3}}\]                   

    B)  \[CrO_{4}^{2-}\]

    C)  \[C{{r}_{2}}O_{7}^{2-}\]      

    D)  \[C{{r}_{3}}O_{10}^{2-}\]

    Correct Answer: C

    Solution :

        Yellow chromates are converted to orange dischromates on adding acid and vice-versa when alkali is added to dischromates. \[2CrO_{4}^{2-}+2{{H}^{+}}\xrightarrow{{}}C{{r}_{2}}O_{7}^{2-}+{{H}_{2}}O\]             


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