RAJASTHAN PMT Rajasthan - PMT Solved Paper-2009

  • question_answer
    \[AgN{{O}_{3}}\] gives red colour with

    A) \[NaCl\]                              

    B)        \[NaBr\]                              

    C)        \[NaI\]                                 

    D)        \[{{K}_{2}}Cr{{O}_{4}}\]

    Correct Answer: D

    Solution :

    \[NaCl+AgN{{O}_{3}}\xrightarrow{{}}\underset{white\,\,ppt.}{\mathop{AgCl\downarrow }}\,+NaN{{O}_{3}}\] \[Nal+AgN{{O}_{3}}\xrightarrow{{}}\underset{light\,\,yellow\,\,ppt.}{\mathop{AgBr\downarrow }}\,+NaN{{O}_{3}}\] \[NaI+AgN{{O}_{3}}\xrightarrow{{}}\underset{yellow\,\,ppt.}{\mathop{AgI\downarrow }}\,+NaN{{O}_{3}}\] \[{{K}_{2}}Cr{{O}_{4}}+2AgN{{O}_{3}}\xrightarrow{{}}\underset{red\,\,ppt.}{\mathop{A{{g}_{2}}Cr{{O}_{4}}}}\,+2KN{{O}_{3}}\]


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