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Consider the reaction equilibrium 2 S O subscript 2 end subscript open parentheses g close parentheses plus O subscript 2 end subscript open parentheses g close parentheses rightwards harpoon over leftwards harpoon 2 S O subscript 3 end subscript open parentheses g close parentheses comma blank increment H degree equals negative 198 blank k J On the basis of Le-Chatelier’s principle, the condition favourable for the forward reaction is

  1. Lowering of temperature as well as pressure  
  2. Lowering the temperature and increasing the pressure  
  3. Increasing the temperature and pressure  
  4. Any value of temperature and pressure  

The correct answer is: Lowering the temperature and increasing the pressure


    It is an exothermic reaction, hence low temperature and increasing pressure will favour forward reaction

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