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Factors Affecting the Rate of a Chemical Reaction

The rate of e...

Question

The rate of exothermic reaction increases with increasing temperature.

A

True

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B

False

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Solution

The correct option is B False
The rate of an exothermic reaction decreases with increasing temperature. For endothermic reaction, the value of K increases with increase in temperature and vice versa. For exothermic reaction, the value of K decreases with increase in temperature and vice versa.

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Q. The rate of an exothermic reaction increases with increase in temperature.

Q. Assertion :For an exothermic reaction, extent of reaction increases with increase in temperature. Reason: With increase in temperature, the rate of forward reaction increases more.

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. The variation of K and

K_{f}

K_{b}

with temperature shows the following effects:
(i) For endothermic reaction K increases and

K_{f}

K_{b}

also increases with temperature.
(ii) For endothermic reaction K decreases and

K_{f}

K_{b}

also decreases with temperature.
(iii) For exothermic reaction K decreases and

K_{f}

K_{b}

both increases with temperature.
(iv) For exothermic reaction K increases and

K_{f}

K_{b}

decreases with temperature.
(v) For exothermic reaction K decreases and

K_{f}

K_{b}

both decreases with temperature.

Q. Assertion :The value of K increases with increase in temperature in case of endothermic reaction. Reason: The increase in temperature shifts the equilibrium in the backward direction in case of exothermic reaction.

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