Practice free Chemical Kinetics (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The chemical reactions in which reactants require high amount of activation energy are generally ................
Slow
The rate of reaction increases with increase of temperature because ...
an increase in the number of activated molecules.
The activation energy of reaction is equal to
Threshold Energy – Energy of the reactants
Collision theory is most satisfactory for __________ reaction.
Bimolecular
If $E_f$ and $E_r$ are the activation energies of the forward and reverse reactions and the reaction is known to be exothermic then
$ E_f \lt E_r $
Which of the following does not affect the rate of reaction ?
OH of reaction
For an endothermic reaction, OH represents the enthalpy of reaction. The minimum value for the energy of activation will be ...
more than OH
For an endothermic reaction $ A --> B . An activation energy of 15 Kcal mole^{-1} and the enthalpy change of reaction is 5 Kcal mole^{-1} . The activation energy for the reaction B --> A $ is
10 Kcal $ mole^{-1} \triangle H = Ea - Ea^r \therefore +5 = 15 - Ea ^5 \therefore Ea^r = 10 $
For an exothermic reaction an activation energy of $ 70 KJ mole^{-1} $ and the enthalpy change of reaction is $ 30 KJ mole^{-1} $ . The activation energy for the reverse reaction is ...
100 Kj $ mole ^ {-1} \triangle H = Ea - Ea^r -30 = 70 - Ea^r \therefore Ea^r = 100 $
The rate constant of the reaction increases by ...
increasing the temperature.
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