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For the reduction of lead oxide by coke S are found toleft parenthesis P b O plus C rightwards arrow P b plus C O right parenthesis comma capital delta H blank a n d blank capital delta Sbe 108.8 kJ mol-1 and 190 JK-1 mol-1 respectively. The minimum temperature above which the reaction will be spontaneous will be

  1. 100°C    
  2. 200°C    
  3. 300°C    
  4. 400°C    

The correct answer is: 300°C

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