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CGP EDU Academic Team
Published on: August 12, 2026
A collision between reactant molecules must occur with a definite minimum energy before it converting to product molecules. This minimum energy is known as activation energy, E a .
(i) If a reaction, A + B → C, is exothermic to the extent of 30 kJ/mol and the forward reaction has an activation energy of 249 kJ/mol, the activation energy for reverse reaction in kJ/mol is –
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Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(i)
Sol. Δ H = 
– 
or – 30 = 249 – 
or 
= 279 kJ/mol.
(ii) [a,c]
Sol.
(iii)
Sol. E a
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