2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main - Mock Test - 24

  • question_answer
    In the reaction : \[S+3/2{{O}_{2}}\to S{{O}_{3}}+2x\]kcal and \[S{{O}_{2}}+1/2{{O}_{2}}\to S{{O}_{3}}+y\]kcal, heat of formation of \[S{{O}_{2}}\]is \[3Br_{2(aq)}^{{}}+3{{H}_{2}}{{O}_{(l)}}\]

    A) (x + y)         

    B) (x - y)

    C) (2x + y)        

    D) (2x - y)

    Correct Answer: D

    Solution :

    [d]:\[S+3/2{{O}_{2}}\to S{{O}_{3}}+2x\,kcal\]             ?(i) \[S{{O}_{2}}+1/2{{O}_{2}}\to S{{O}_{3}}+y\,kcal\]               ?(ii) Now, subtract eq. (ii) from (i), we get \[S+{{O}_{2}}\to S{{O}_{2}}+2x-y\,kcal\] \[\therefore \]Heat of formation of \[S{{O}_{2}}\]is equal to 2x - y kcal.


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