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NEET Sample Paper NEET Sample Test Paper-33

  • question_answer
    \[S{{O}_{2}}C{{l}_{2}}S{{O}_{2}}+C{{l}_{2}}\] is a first order reaction with \[K=2.2\times {{10}^{-5}}\text{ }se{{c}^{-1}}\] at \[320{}^\circ C\]. The percentage of \[S{{O}_{2}}C{{l}_{2}}\] decompsed on heating for 90 minutes is

    A)  \[1.118\]             

    B)  \[0.1118\]

    C)  \[18.11\]             

    D)  \[11.18\]

    Correct Answer: D

    Solution :

    \[k=\frac{2.303}{t}\log \frac{a}{a-x}\] \[\log \frac{a}{a-x}=\frac{kt}{2.303}\] \[=\frac{2.2\times {{10}^{-5}}\times 60\times 90}{2.303}\] \[=0.0516\] Hence  \[\frac{a}{a-x}=1.127\] \[\frac{a-x}{a}=0.887\] or \[1-\frac{x}{a}=0.887\] \[\frac{x}{a}=0.113=11.3%\]


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