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Covalent Bond

The value K...

Question

The value $K_{c}$ of a reaction has a higher value at higher temperature. The reaction is exothermic in nature.

A

True

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B

False

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Solution

The correct option is B False
The value $K_{c}$ of a reaction has a higher value at higher temperature. The reaction is endothermic in nature.
For an endothermic reaction, when temperature is raised, the reaction shifts in forward direction so that more heat is absorbed during the reaction and the effect of increased temperature is nullified.
The value $K_{c}$ of a reaction has a lower value at higher temperature. The reaction is exothermic in nature.

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Similar questions

Q. The reactions having higher value of

K_{c}

are faster than the reactions having lower values of

K_{c}

.

Q. Assertion :The value of K for a reaction may increase or decrease with increase in temperature depending upon whether the reaction is exothermic or endothermic. Reason: With increase in temperature, the extent of reaction increases.

Q. Assertion :The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature. Reason: When a system in equilibrium is disturbed by changing the temperature, it will tend to adjust itself so as to overcome the effect of the change.

Q. The elementary reaction

A + B \to

k = 2 \times 10^{- 5} M^{- 1} s^{- 1}

at a temperature of

27^{o} C

. Several experimental runs are carried out using stoichiometric proportion. The reaction has a temperature coefficient value of 2.0. At what temperature should the reaction be carried out if inspite of halving the concentrations, the rate of reaction is desired to be 50% higher than a previous run. (Given:

\frac{l n 6}{l n 2} = 2.585)

.

Q. Statement 1: An exothermic reaction has a negative value of

△ H

.
Statement 2 : In an exothermic reaction the products have less potential energy than the reactants.

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