KVPY Sample Paper KVPY Stream-SX Model Paper-17

  • 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. ionisation enthalpy.

    B) Nitrogen does not show allotropy.

    C) A brown ring is formed to 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 :

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


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