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JEE Main & Advanced Sample Paper JEE Main Sample Paper-1

  • question_answer
    Direction: Question No. 50 is assertion reason type. These question contains two statements Statement I (Assertion), Statement II (Reason). These question also has four alternative choices, only one of which is correct. You have to select the correct choices from the codes (a), (b), (c) and (d) given below:
    Statement I: 4 moles of \[KCl{{O}_{3}}\](50% pure) gave 3 moles of \[{{O}_{2}}\]on heating strongly and thus, yield is 100%.\[2KCl{{O}_{3}}\to 2KCl+3{{O}_{2}}\]
    Statement II: 3 moles of\[{{O}_{2}}\] are Obtained from 2 moles of\[KCl{{O}_{3}}\].

    A)  Statement I is true; Statement II is true; Statement II is not a correct explanation for Statement I.

    B)  Statement I is true; Statement II is false.

    C)  Statement I is false; Statement II is true.

    D)  Statement I is true; Statement II is true; Statement II is not a correct explanation for Statement I.

    Correct Answer: A

    Solution :

     \[2KCl{{O}_{3}}\to \,2KCl+3{{O}_{2}}\] Generally 2 moles of\[KCl{{O}_{3}}\] on decomposition gives 3 moles of\[{{O}_{2}}.\]. \[\therefore \]\[KCl{{O}_{3}}\]is 50% pure \[\therefore \] 2 moles of\[KCl{{O}_{3}}\] gives = 1.5 moles of\[{{O}_{2}}.\] \[\therefore \]4 moles of \[KCl{{O}_{3}}\] gives = 3 moles of\[{{O}_{2}}.\]


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