NEET Chemistry Chemical Kinetics Questions Solved


In gaseous reactions important for the understanding of the upper atmosphere H2O and O react bimolecularly to form two OH radicals. H for this reaction is 72kJ at 500 K and Ea is 77 kJ mol-1, then Ea for the bimolecular recombination of two OH radicals to form H2O and O is:

(a) 3 kJ mol-1

(b) 4 kJ mol-1

(c) 5 kJ mol-1

(d) 7 kJ mol-1

(c) H2O + O 2OH; H = 72KJ at 500K;

Given Ea = 77KJmol-1

2OH H2O + O ; Ea.B.R 

77=72+Ea.B.R 

Ea.B.R = 5 KJmol-1

 

Difficulty Level:

  • 10%
  • 22%
  • 65%
  • 5%