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NEET Sample Paper NEET Sample Test Paper-1

  • question_answer
    A deliquescent white crystalline hydroxide X reacts with a nitrate Y to form another hydroxide which decomposes to give a insoluble brown layer of its oxide. X is a powerful cautery and breaks down the proteins of skin flesh to a pasty mass. X and Y are

    A)  \[NaOH,AgN{{O}_{3}}\]   

    B)  \[NaOH,Zn{{(N{{O}_{3}})}_{2}}\]

    C)  \[NaOH,Al{{(N{{O}_{3}})}_{3}}\]  

    D)  \[Ca{{(OH)}_{2}},\,HgN{{O}_{3}}\]

    Correct Answer: A

    Solution :

    \[\underset{Deliquescent}{\mathop{NaOH}}\,+\underset{(Y)}{\mathop{AgN{{O}_{3}}}}\,\xrightarrow[{}]{}\underset{unstable}{\mathop{AgOH}}\,+NaN{{O}_{3}}\] White crystal \[2AgOH\xrightarrow{{}}\underset{brown}{\mathop{A{{g}_{2}}O}}\,+{{H}_{2}}O\] (X) is a powerful cautery and breaks down the proteins of skin flesh to a pasty mass i.e. X is caustic soda.


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