JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Self Evaluation Test - Some Basic Concepts of Chemistry

  • question_answer
    If potassium chlorate is 80% pure, then 48 g of oxygen would be produced from (atomic mass of K=39)

    A) 153.12 g of \[KCl{{O}_{3}}\]    

    B) 122.5 g of \[KCl{{O}_{3}}\]

    C) 245 g of\[KCl{{O}_{3}}\]  

    D) 98 g of \[KCl{{O}_{3}}\]

    Correct Answer: A

    Solution :

    [a] \[\underset{\begin{smallmatrix}  2\times 122.5g \\  \,\,\,\,\,\,\,245 \end{smallmatrix}}{\mathop{2KCl{{O}_{3}}}}\,\xrightarrow{^{heat}}2KCl+\underset{\begin{smallmatrix}  3\times 32g \\  \,\,\,\,\,96 \end{smallmatrix}}{\mathop{3{{O}_{2}}}}\,\] 48 g of oxygen will be produced from 122.5 g of \[KCl{{O}_{3}}\] \[\therefore \] Amount of 80% \[KCl{{O}_{3}}\] needed \[=\frac{100}{80}\times 122.5=153.12g\]


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