Question

Select the incorrect statement:
A.A spontaneous reaction is not necessarily a fast reaction.
B.Larger the activation energy, greater is the effect on rate constant with rise in temperature.
C.The reactivity of bromine is more in liquid state than in vapour state.
D.Reactions with low energy of activation are fast.

Answer 1

Hint:Spontaneous reactions area unit those chemical or biological reactions that happen while not the influence of external factors. Non- Spontaneous reactions are units of chemical reactions that need an energy input to proceed or that can't happen while not under the influence of external factors.

Complete step-by-step answer: Spontaneous reactions area unit those chemical or biological reactions that happen while not the influence of external factors or while not being driven by an out of doors force. Spontaneous changes are called natural processes .It primarily doesn't need energy input to proceed below specific conditions. During this case the full energy of the product is a smaller amount than that of the reactants.  These reactions even have negative physical properties and it will increase entropy.
These reactions tend to unharness the free energy from the system and therefore create it additional stability. These kinds of reactions occur apace and also the amendment of Gibbs free energy could be a negative price, this will be explained because the unharness of free energy from the system corresponds to negative amendment in free energy $\left( \Delta G \right)$ however to a positive amendment for the environment. The reactivity is additional in an unstable state. Halogen is additional stable in liquid state than vapour state. Therefore it's additional reactive in vapour state than in liquid state.
Therefore, Option C is correct option, i.e. the reactivity of bromine is more in liquid state than in vapour state is incorrect statement.

Note:Gibbs free energy $\left( \Delta G \right)$ is that the free energy of a system is that the total of its physical property and the merchandise of the temperature in Kelvin and also the entropy $\left( S \right)$ of the system. Enthalpy $\left( H \right)$is physical property could be a property of a thermodynamic system. it's outlined because the total of a system's internal energy and also the product of its pressure and volume. Entropy $\left( S \right)$ are often outlined because the property of a system that measures the degree of disorder or randomness within the system.