JEE Main & Advanced JEE Main Online Paper (Held On 08 April 2018)

  • question_answer
    The compound that does not produce nitrogen gas by the thermal decomposition is: [JEE Main Online 08-04-2018]

    A)  \[\text{N}{{\text{H}}_{\text{4}}}\text{N}{{\text{O}}_{\text{2}}}\]                   

    B)  \[{{\text{(N}{{\text{H}}_{\text{4}}}\text{)}}_{2}}\text{S}{{\text{O}}_{4}}\]

    C)  \[\text{Ba(}{{\text{N}}_{\text{3}}}{{\text{)}}_{\text{2}}}\]                   

    D)  \[{{\text{(N}{{\text{H}}_{\text{4}}}\text{)}}_{\text{2}}}\text{C}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\]

    Correct Answer: B

    Solution :

    \[{{\text{(N}{{\text{H}}_{\text{4}}}\text{)}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\xrightarrow{\Delta }\text{N}{{\text{H}}_{\text{3}}}\text{+}{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] \[Ba{{({{N}_{3}})}_{2}}\xrightarrow{\Delta }Ba+3{{N}_{2}}\uparrow \] \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }{{N}_{2}}\uparrow +\underset{(Green)}{\mathop{C{{r}_{2}}{{O}_{3}}}}\,+4{{H}_{2}}O\] \[N{{H}_{4}}N{{O}_{2}}\xrightarrow{\Delta }{{N}_{2}}\uparrow +2{{H}_{2}}O\]


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