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NEETChemistrySolid State

Why is FeO (s) not formed in stoichiometric composition?

Options

  1. ABecause iron (Fe) and oxygen (O) do not react with each other.
  2. BIn the crystals of FeO, some of the Fe 2+ cations are replaced by Fe 3+ ions. Three Fe 2+ ions are replaced by
  3. CBecause FeO can only exist as a gas.
  4. DBecause impurities in the reactants enhance the formation of FeO in its stoichiometric ratio.

Correct answer

B. In the crystals of FeO, some of the Fe 2+ cations are replaced by Fe 3+ ions. Three Fe 2+ ions are replaced by

Step-by-step solution

Correct Option is : (B) In the crystals of FeO, some of the Fe 2+ cations are replaced by Fe 3+ ions. Three Fe 2+ ions are replaced by two Fe 3+ ions to make up for the loss of positive charge. Eventually there would be less amount of metal as compared to stoichiometric proportion.

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