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Question

ThevaluesofDHandDSforthereaction,C(graphite)+CO(g)→2CO(g)are170kJand170 JK1respectively.Thisreactionwillbespontaneousat

  1. 510K    
  2. 710K    
  3. 910K    
  4. 1110K    

The correct answer is: 1110K

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Reason: Sum of all r‐digit numbers formed by taking the given n digits (without zero) is (sum of all the n digits) cross times left parenthesis n minus left parenthesis A right parenthesis blank P subscript r minus 1 end subscript cross times( 111 horizontal ellipsis. r times).

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