6. Consider the Arrhenius equation given below and mark the correct option. k =Ae (a) Rate constant increases exponentially with increasing activation energy _ and decreasing temperature. (b) Rate constant decreases exponentially with increasing activation energy and decreasing temperature. (c) Rate constant increases exponentially with decreasing activation energy and decreasing temperature. (d) Rate constant increases exponentially with decreasing activation energy and increasing temperature.

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Consider the Arrhenius equation given below and mark the correct option.
$k = A . e - \frac{E_{a}}{R T}$
(a) Rate constant increases exponentially with increasing activation energy and decreasing temperature
(b) Rate constant decreases exponentially with increasing activation energy and decreasing temperature
(c) Rate constant increases exponentially with decreasing activation energy and decreasing temperature
(d) Rate constant increases exponentially with decreasing activation energy and increasing temperature

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

Q. Assertion :A rate of reaction of most of the reactions doubles, when temperature increased from

298 K

308 K

. Reason: The activation energy of reaction decreases with increase in temperature.

Q. Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as

k = A e^{- \frac{E_{a}}{R T}}

This method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied.
The pre-exponential factor in the Arrhenius equation of a first order reaction has the unit:

Q. Assertion :In chemisorption, adsorption first increases with temperature and then decreases. Reason: Heat keeps on providing more and more activation energy.

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