NEET Sample Paper NEET Sample Test Paper-27

  • question_answer
    Which of the following has no unpaired electrons but is coloured?

    A)  \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]        

    B)  \[{{K}_{2}}Mn{{O}_{4}}\]

    C)  \[CuS{{O}_{4}}.5{{H}_{2}}O\]               

    D)  \[MnC{{l}_{2}}\]

    Correct Answer: A

    Solution :

    Potassium dichromate             \[({{K}_{2}}C{{r}_{2}}{{O}_{7}})\] has no unpaired electrons but it is orange coloured compound.   


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