According to the graph, which of the following statement is correct?

The change in enthalpy will have a negative value.

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The activation energy slowed down the reaction rate.

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There was a net gain of potential energy.

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The presence of an activation complex increased the amount of energy gained in the products.

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Solution

The correct option is A The change in enthalpy will have a negative value.
According to the image, the energy of the product is less than the reactant. This means this equation has released energy and is exothermic. Therefore, $Δ H$ is negative.

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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

Mark the incorrect statements.
(a)Catalyst provides an alternative pathway to reaction mechanism
(b)Catalyst raises the activation energy
(c)Catalyst lowers the activation energy
(d)Catalyst alters enthalpy change of the reaction

Q. A certain reaction rate increases

1000

folds in the presence of a cataylst at

27^{\circ} C

. The activation energy of the original pathway is

98 k J / m o l

. What is the activation energy of the new pathway?

Q. Assertion :A positive catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction increases.

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According to the graph, which of the following statement is correct?

The correct option is A The change in enthalpy will have a negative value.According to the image, the energy of the product is less than the reactant. This means this equation has released energy and is exothermic. Therefore, ΔH is negative.

The correct option is A The change in enthalpy will have a negative value.
According to the image, the energy of the product is less than the reactant. This means this equation has released energy and is exothermic. Therefore, $Δ H$ is negative.