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NEET AIPMT SOLVED PAPER SCREENING 2007

  • question_answer
                    The reaction of hydrogen and iodine monochloride is given as:                                                                  \[{{H}_{2}}(g)+2ICl(g)\xrightarrow{{}}2HCl(g)+{{I}_{2}}(g)\]                 This reaction is of first order with respect to \[{{H}_{2}}(g)\] and \[ICl(g)\]¸following mechanisms were proposed:                 Mechanism A:                   \[{{H}_{2}}(g)+2ICl(g)\xrightarrow{{}}2HCl(g)+{{I}_{2}}(g)\]                 Mechanism B:                 \[{{H}_{2}}(g)+ICl(g)\xrightarrow{{}}HCl(g)+HI(g)\]; show                 \[HI(g)+ICl(g)\xrightarrow{{}}HCl(g)+{{I}_{2}}(g)\]; fast                 Which of the above mechanism (s) can be consistent with the given information about the reaction?

    A)                 B only     

    B)                 A and B both

    C)                 Neither A nor B  

    D)                 A only

    Correct Answer: B

    Solution :

                    Rate of reaction is always depends on slow reaction.                 \[{{H}_{2}}(g)+2ICl(g)\xrightarrow[{}]{{}}2HCl(g)+{{I}_{2}}(g)\] is first order reaction respect to H2 and I2 can be measured with the help of both mechanism A and B.


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