J & K CET Medical J & K - CET Medical Solved Paper-2006

  • question_answer
    In which of the following reactions, the heat liberated is known as "heat of combustion"?

    A) \[{{H}^{+}}(aq)+O{{H}^{-}}(aq)\to {{H}_{2}}O(l)+heat\]

    B)  \[C(graphite)+\frac{1}{2}{{O}_{2}}(g)\to CO(g)+heat\]

    C)  \[C{{H}_{4}}(g)+2{{O}_{2}}(g)\to C{{O}_{2}}(g)+2{{H}_{2}}O(l)\]\[+heat\]

    D)  \[{{H}_{2}}S{{O}_{4}}(aq)+{{H}_{2}}O(l)\to {{H}_{2}}S{{O}_{4}}(aq)+heat\]

    Correct Answer: C

    Solution :

                    The amount of heat which is evolved or absorbed. When 1 mol of the substance is completely oxidised. For example, \[C{{H}_{4}}(g)+2{{O}_{2}}(g)\to C{{O}_{2}}(g)+2{{H}_{2}}O(l)+heat\]


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