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AIIMS2005ChemistryGeneral Principles and Processes of Isolation of Metals

Assertion : Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason : The reaction Fe ₂ O _ 3(s) Fe _ (s) +3 / 2 O _ 2( ~g ) is a spontaneous process.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

Extraction of iron metal from iron oxide ore is carried out by heating with coke and flux (calcium carbonate). Flux is a slag forming substance. It converts infusible impurities into fusible slag. The reaction : Fe ₂ O _ 3(s) Fe _ (s) +3 / 2 O _ 2( ~g ) is not a spontaneous process. Fe ₂ O ₃ is converted to FeO at about 400^ C . FeO is converted to Fe at about 800^ C -1000^ C

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