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NEET UG CHEMISTRY MCQ: CHEMICAL KINETICS

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N2(g)+3H2(g)  ⇋  2NH3(g)+22  kcal{\mathrm{N}_2}\left( \mathrm{g} \right) + 3{\mathrm{H}_2}\left( \mathrm{g} \right)\;\leftrightharpoons\;2\mathrm{N}{\mathrm{H}_3}\left( \mathrm{g} \right) + 22\;\mathrm{kcal}.

The activation energy for the forward reaction is 50  kcal.50\mathrm{ }\;kcal. What is the activation energy for the backward reaction?
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Correct option: D
+72  kcal+ 72\mathrm{ }\;kcal
Option D (+72  kcal+ 72\mathrm{ }\;kcal) is correct because the activation energy for the backward reaction is the sum of the activation energy for the forward reaction and the enthalpy change of the reaction.

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If the reaction rate at a given temperature becomes slower then 1[A]2\frac{1}{{{{\left[ A \right]}^2}}} vs times are a straight line. Order of reaction is The rate constant (k′)\left( {k'} \right) of one of the reaction is found to be double that of the rate constant (k′′)\left( {k''} \right) of another reaction. Then the relationship between the corresponding activation energies of the two reaction (E′a  and  E′′a)\left( {{{E'}_a}\;\mathrm{and}\;{{E''}_a}} \right) can be represented as Acid hydrolysis of sucrose is a Order of radioactive disintegration reaction is Temperature coefficient of a reaction is 2. When temperature is increased from 30∘C  to  100∘C30^\circ C\;to\;100^\circ C, rate of the reaction increases by
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