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Factors Affecting the Rate of a Chemical Reaction

The rate of a...

Question

The rate of an exothermic reaction increases with increase in 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 exothermic reaction increases with increasing 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. 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.

Q. Assertion :Observed rate constant of the given reaction given below decreases with temperature.

N O + N O_{f} K_{b} N_{2} O_{2}

N_{2} O_{2} + O_{2} K \to s l o w 2 N O_{2}

2 N O + O_{2} \to 2 N O_{2}

K_{c}

of the reaction being exothermic and decrease in

K_{c}

overweigh increase in K with increase in temperature.

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Factors Affecting the Rate of a Chemical Reaction

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