Select the incorrect statement :

A spontaneous reaction is not necessarily a fast reaction

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Larger the activation energy, greater is the effect on rate constant with rise in temperature

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The reactivity of bromine is more in liquid state than in vapour state

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Reactions with low energy of activation are fast

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Solution

The correct option is C The reactivity of bromine is more in liquid state than in vapour state
The reactivity is more in unstable state. Bromine is more stable in liquid state than vapour state. Thus it is more reactive in vapour state than in liquid state.

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Similar questions

Q. The rate of reaction is fast when the activation energy is _______ (small/large).

Q. Assertion :For a chemical reaction with rise in temperature by

10^{\circ} C

, the rate constant is nearly doubled. Reason: At

t + 10

, the fraction of molecules having energy equal to or greater than activation energy gets doubled.

Which of the following statements are in accordance with the Arrhenius equation?
(a) Rate of a reaction increases with increase in temperature
(b) Rate of a reaction increases with a decrease in activation energy
(c) Rate constant decreases exponentially with an increase in temperature
(d) Rate of reaction decreases with a decrease in activation energy

Q. At a certain temperature, the first order rate constant

k_{1}

is found to be smaller than the second order rate constant

k_{2}

. If the energy of activation

E_{1}

of the first order reaction is greater than energy of activation

E_{2}

of the second order reaction, then with increase in temperature:

Q. Assertion :If the activation energy of reaction is zero, temperature will have no effect on the rate constant. Reason: Lower the activation energy faster is the reaction.

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Select the incorrect statement :

The correct option is C The reactivity of bromine is more in liquid state than in vapour stateThe reactivity is more in unstable state. Bromine is more stable in liquid state than vapour state. Thus it is more reactive in vapour state than in liquid state.

The correct option is C The reactivity of bromine is more in liquid state than in vapour state
The reactivity is more in unstable state. Bromine is more stable in liquid state than vapour state. Thus it is more reactive in vapour state than in liquid state.