JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Preliminary Test

  • question_answer
    When concentrated \[{{H}_{2}}S{{O}_{4}}\] is added to dry \[KN{{O}_{3}}\], brown fumes evolve. These fumes are [CPMT 1988; IIT 1987]

    A) \[S{{O}_{2}}\]

    B) \[S{{O}_{3}}\]

    C) \[NO\]

    D) \[N{{O}_{2}}\]

    Correct Answer: D

    Solution :

     \[2KN{{O}_{3}}+{{H}_{2}}S{{O}_{4}}\to 2KHS{{O}_{4}}+\underset{\text{(Brown gas)}}{\mathop{2\ N{{O}_{2}}\,\uparrow \,\,}}\,\]


You need to login to perform this action.
You will be redirected in 3 sec spinner