KVPY Sample Paper KVPY Stream-SX Model Paper-15

  • question_answer
    Which one of the following complexes shows optical isomerism?

    A) \[cis-[Co{{(en)}_{2}}C{{l}_{2}}]Cl\]     

    B) \[trans-[Co{{(en)}_{2}}C{{l}_{2}}]Cl\]

    C) \[cis-[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl\]

    D) \[trans-[Co{{(N{{H}_{3}})}_{4}}C{{l}_{3}}]\]

    Correct Answer: A

    Solution :

    Optical isomerism arises in those compounds where the mirror images are non-superimposable.
    Complexes like \[[\,M{{(AA)}_{2}}{{X}_{2}}]\] (only c is form) and \[[M{{(AA)}_{3}}]\]exhibit optical isomerism.
     \[[Co(N{{H}_{3}})C{{l}_{2}}]Cl\]can exist in both c is and trans forms that are given below:
    \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{3}}]\]exists in fac and mer-isomeric forms and both are optically inactive.
    Thus, the correct option is [a].


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