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प्रश्न
Explain the following terms :
Half life period of a reaction (t1/2)
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उत्तर
Half life period of a reaction (t1/2)
The half life of a reaction is the time period in which the concentration of a reactant is reduced to one half of its initial concentration.
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संबंधित प्रश्न
A first-order reaction is 50% completed in 40 minutes at 300 K and in 20 minutes at 320 K. Calculate the activation energy of the reaction. (Given : log 2 = 0·3010, log 4 = 0·6021, R = 8·314 JK–1 mol–1)
The rate of chemical reaction becomes double for every 10° rise in temperature because of ____________.
During decomposition of an activated complex:
(i) energy is always released
(ii) energy is always absorbed
(iii) energy does not change
(iv) reactants may be formed
Mark the incorrect statements:
(i) Catalyst provides an alternative pathway to reaction mechanism.
(ii) Catalyst raises the activation energy.
(iii) Catalyst lowers the activation energy.
(iv) Catalyst alters enthalpy change of the reaction.
Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example.
For an endothermic reaction energy of activation is Ea and enthalpy of reaction ΔH (both of there in KJ moI–1) minimum value of Ea will be ______.
In respect of the eqn k = \[\ce{Ae^{{-E_a}/{RT}}}\] in chemical kinetics, which one of the following statement is correct?
The activation energy in a chemical reaction is defined as ______.
What happens to the rate constant k and activation energy Ea as the temperature of a chemical reaction is increased? Justify.
Which plot of ln k vs `1/T` is consistent with the Arrhenius equation?
