2. Solved Papers
  3. VMMC

VMMC VMMC Medical Solved Paper-2006

  • question_answer
    For a reaction, \[X(g)\xrightarrow{{}}Y(g)+Z(g)\] the half life period is 10 min. In what period of time would the concentration of X be reduced to 10% of original concentration?

    A)  20 min                 

    B)         33 min                 

    C)         15 min                                 

    D)         25 min

    Correct Answer: B

    Solution :

    \[X(g)\xrightarrow{{}}Y(g)+Z(g)\] The reaction is a first order reaction. Hence, \[k=\frac{0.693}{{{t}_{1/2}}}=\frac{2.303}{t}\log \frac{a}{(a-x)}\]                 \[\therefore \]  \[\frac{0.693}{10}=\frac{2.303}{t}\log \frac{a}{a/10}\]                 or            \[t=\frac{2.303\times 10}{0.693}\times \log 10\]                                 \[=33\,\min .\]


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