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NEET Chemistry NEET PYQ-The d-and f-Block Elements

  • question_answer
    Which one of the following statements is correct when \[\text{S}{{\text{O}}_{\text{2}}}\]is passed through acidified \[{{\text{K}}_{2}}C{{r}_{2}}{{O}_{7}}\]solution?                              [NEET - 2016]

    A) The solution turns blue

    B) The solution is decolourized

    C) \[\text{S}{{\text{O}}_{\text{2}}}\]is reduced

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

    Correct Answer: D

    Solution :

    [d] \[{{K}_{2}}C{{r}_{2}}O{{}_{7}}+S{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\]\[\to {{K}_{2}}S{{O}_{4}}+\underset{\text{green colour}}{\mathop{C{{r}_{2}}{{(S{{O}_{4}})}_{3}}+{{H}_{2}}O}}\,\]


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