2. Solved Papers
  3. AIIMS

AIIMS AIIMS Solved Paper-2015

  • question_answer
    The factor of \[\Delta G\]values is important in metallurgy. The \[\Delta G\] values for the following reactions at 800°C are given as \[{{S}_{2}}(g)+2{{O}_{2}}(g)\xrightarrow{{}}2S{{O}_{2}}(g);\]\[\Delta G=-544kJ\] \[2Zn(s)+{{s}_{2}}(g)\xrightarrow[{}]{{}}2ZnS(s);\Delta G=-293kJ\] \[2Zn(s)+{{O}_{2}}(g)\xrightarrow{{}}2ZnO(s);\Delta G=-480kJ\] The \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\] for the reaction, \[2ZnS(g)+3{{O}_{2}}(g)\xrightarrow{{}}2ZnO(s);\Delta G=-480kJ\]will be

    A) \[-731kJ\]  

    B) \[-787kJ\]

    C) \[-534\text{ }kJ\]            

    D) \[-554\text{ }kJ\]

    Correct Answer: A

    Solution :

    \[\underset{-293}{\mathop{2Zn(s)}}\,+\underset{0}{\mathop{3{{O}_{2}}(g)}}\,\xrightarrow{{}}\underset{-480}{\mathop{2ZnO(s)}}\,+\underset{-544}{\mathop{2S{{O}_{2}}(g)}}\,\] \[\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{CON}{{\text{H}}_{\text{2}}}\] \[\text{C}{{\text{H}}_{\text{3}}}NCO\] \[\text{C}{{\text{H}}_{\text{3}}}\text{CON}{{\text{H}}_{2}}\] \[{{(N{{H}_{2}})}_{2}}CO\]                                


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