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JEE Main & Advanced Chemistry The s-Block Elements / s-ब्लॉक के तत्व Question Bank Mock Test - The s-Block Elements

  • question_answer
    A and B are two salts. A with dilute HCl and B with cone. \[{{H}_{2}}S{{O}_{4}}\]react to give reddish brown vapours, hence a and B respectively are:

    A) NaBr, \[NaN{{O}_{3}}\]

    B) \[NaN{{O}_{3}}\], NaBr

    C) NaBr,\[NaN{{O}_{2}}\]

    D) \[NaN{{O}_{2}}\], NaBr

    Correct Answer: D

    Solution :

    [d] \[NaN{{O}_{2}}\] gives \[N{{O}_{2}}\] (brown) with dil. acids whereas NaBr and \[NaN{{O}_{2}}\] both give brown vapours \[B{{r}_{2}}\] and \[N{{O}_{2}}\] respectively with cone. acids.


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