BCECE Medical BCECE Medical Solved Papers-2014

  • question_answer
    Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

    A)  concentrated hydrochloric acid emits strongly smelling \[HCl\] gas all the time

    B)  oxygen in air reacts with the emitted \[HCl\]gas to form a could of chlorine gas

    C)  strong affinity of \[HCl\] gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke

    D)  due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence, the cloud.

    Correct Answer: B

    Solution :

    \[2HCl+\frac{1}{2}{{O}_{2}}\xrightarrow{{}}{{H}_{2}}O+C{{l}_{2}}\]


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