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NEET Chemistry Analytical Chemistry Question Bank Self Evaluation Test - Analytical Chemistry

  • question_answer
    A salt which gives \[C{{O}_{2}}\] with hot conc. \[{{H}_{2}}S{{O}_{4}}\] and also decolourizes acidified\[KMn{{O}_{4}}\]. On warming is:

    A) \[HCO_{3}^{-}\]                     

    B) \[CO_{3}^{2-}\]

    C) Qxalate            

    D) Acetate

    Correct Answer: C

    Solution :

    [c] \[N{{a}_{2}}{{C}_{2}}{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\to \] \[N{{a}_{2}}S{{O}_{4}}+{{H}_{2}}O+CO+C{{O}_{2}}\] CO burns with blue flame \[2CO+{{O}_{2}}\to 2C{{O}_{2}}\] \[N{{a}_{2}}{{C}_{2}}{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\left( dil \right)\to \] \[N{{a}_{2}}S{{O}_{4}}+{{H}_{2}}{{C}_{2}}{{O}_{4}}\] \[2KMn{{O}_{4}}+3{{H}_{2}}S{{O}_{4}}+5{{H}_{2}}{{C}_{2}}{{O}_{4}}\to \] \[{{K}_{2}}S{{O}_{4}}+2MnS{{O}_{4}}+8{{H}_{2}}O+10C{{O}_{2}}\]


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