2. Solved Papers
  3. CMC Medical

CMC Medical CMC-Medical VELLORE Solved Paper-2007

  • question_answer
    The weight of iron which will be converted into its oxide \[(F{{e}_{3}}{{O}_{4}})\]by the action of 18 g of steam on it will be (at. wt. of Fe = 56)

    A)  168 g                                    

    B)  84 g

    C)  42 g                                      

    D)  21 g

    Correct Answer: C

    Solution :

                    \[3Fe+4{{H}_{2}}O\xrightarrow{{}}F{{e}_{3}}{{O}_{4}}+4{{H}_{2}}\] \[3\times 56g\,\,4\times 18g\] \[4\times 18g\,{{H}_{2}}O\equiv 3\times 56g\,Fe\] \[\therefore \]  \[18g\,{{H}_{2}}O=\frac{3\times 56}{4}=42g\]


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