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KVPY Sample Paper KVPY Stream-SX Model Paper-29

  • question_answer
    Among \[[Ni{{(CO)}_{4}}],{{[NiC{{l}_{4}}]}^{2-}},[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl,\] \[N{{a}_{3}}[Co{{F}_{6}}],N{{a}_{2}}{{O}_{2}}\] and \[Cs{{O}_{2}}\] the total number of paramagnetic compounds is

    A) 2

    B) 3

    C) 4

    D) 5

    Correct Answer: B

    Solution :

    Compound/ Ion of compound Magnetic nature
    1. \[[Ni{{(CO)}_{4}}]\]      Diamagnetic
    2. \[{{[NiC{{l}_{4}}]}^{2-}}\] Paramagnetic
    3. \[a[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl~\] Diamagnetic
    4. \[Na[Co{{F}_{6}}]\] Paramagnetic
    5. \[N{{a}_{2}}{{O}_{2}}\] Diamagnetic      
    6. \[Cs{{O}_{2}}\] Paramagnetic
    So total number of paramagnetic compounds is 3.


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