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8th Class Science Materials : Metals and Non-metals Question Bank Metals and Non Metals Formative Sujective Problems

  • question_answer
    A and B are products when Fe reacts with steam. Identify A and B. (a) \[F{{e}_{3}}{{O}_{4}},{{H}_{2}}O\]                     (b) \[F{{e}_{2}}{{O}_{3}},{{H}_{2}}O\] (c) \[F{{e}_{3}}{{O}_{4}},{{H}_{2}}\]                         (d) \[F{{e}_{2}}{{O}_{3}},{{H}_{2}}\]

    Answer:

    We know that \[Active\text{ }metal+Water(steam)\xrightarrow{{}}Metal\text{ }oxide+Hydrogen\] \[\underset{Iron}{\mathop{3Fe}}\,+4{{H}_{2}}O\xrightarrow{{}}\underset{Iron\,oxide}{\mathop{F{{e}_{3}}{{O}_{4}}}}\,+{{H}_{2}}\]


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