NEET Chemistry MCQs

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    NEET Questions / Chemistry

    8594.

    KMnO4{\rm{KMn}}{{\rm{O}}_4} on heating above 200∘^\circ C gives:

    A

    K2MnO3+O2+MnO2{{\rm{K}}_2}{\rm{Mn}}{{\rm{O}}_3} + {{\rm{O}}_2} + {\rm{Mn}}{{\rm{O}}_2}

    B

    K2MnO4+MnO2+O2{{\rm{K}}_2}{\rm{Mn}}{{\rm{O}}_4} + {\rm{Mn}}{{\rm{O}}_2} + {{\rm{O}}_2}

    C

    MnO2+O2{\rm{Mn}}{{\rm{O}}_2} + {{\rm{O}}_2}

    D

    None of the above

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    8596.

    Larger number of oxidation states are exhibited by the actinoides than those by the lanthanoides, the main reason being

    A

    4ff- orbitals more diffused than the 5ff-orbitals

    B

    Lesser energy difference between 5ff and 6dd than between 4ff and 5dd-orbitals

    C

    More energy difference between 5ff and 6dd than between 4ff and 5dd-orbitals.

    D

    More reactive nature of the actinoides than the lanthanoides

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    8598.

    Philosopher’s wool when heated with BaO at 1100∘^\circ C gives the compound :

    A

    BaZnO2{\rm{BaZn}}{{\rm{O}}_2}

    B

    Ba+ZnO2{\rm{Ba}} + {\rm{Zn}}{{\rm{O}}_2}

    C

    BaCdO2{\rm{BaCd}}{{\rm{O}}_2}

    D

    BaO2+Zn{\rm{Ba}}{{\rm{O}}_2} + {\rm{Zn}}

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    8599.

    Cuprous chloride is obtained from cupric chloride:

    A

    By heating cupric chloride with chlorine

    B

    By the electrolysis of cupric chloride containing HCl

    C

    By heating cupric chloride with conc. HCl and copper turnings

    D

    By passing H2β€…β€Š{{\rm{H}}_2}\; over CuCl2{\rm{CuC}}{{\rm{l}}_2}

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