KVPY Sample Paper KVPY Stream-SX Model Paper-1

  • question_answer
    Among the following statements which is INCORRECT -                  

    A) In the preparation of compounds of Xe, Bartlett had taken \[{{O}_{2}}Pt{{F}_{6}}\] as a base compound because both \[{{O}_{2}}\] and Xe have almost same ionization enthalpy.

    B) Nitrogen does not show allotropy.

    C) A brown ring is formed in the ring test for \[N{{O}_{{{3}^{-}}}}\] ion. It is due to the formation of \[{{[Fe{{({{H}_{2}}O)}_{5}}(NO)]}^{2+}}\]

    D) On heating with concentrated NaOH solution in an inert atmosphere of  \[C{{O}_{2}},\] red phosphorus gives \[P{{H}_{3}}\] gas  

    Correct Answer: D

    Solution :

    [D] On heating with concentrated NaOH solution in an inert atmosphere of \[C{{O}_{2}},\]white phosphorus gives \[P{{H}_{3}}\]gas.


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