How much the rate of a reaction change when temperature is raised by 10°?

For common chemical reaction, the rate of reaction becomes double for every 10° rise in temperature.
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Give two examples of a reaction whose rate increases with the progress of the reaction.

 (i) Hydrolysis of ester increases with time due to auto catalytic action of CH3 COOH formed.

(ii) Decolorisation of KMnO4 by oxalic acid becomes fast due to auto catalytic action of Mn2+.

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Name the reaction order whose rate does not fall with the progress of the reaction?

Zero order reaction does not fall with the progress of the reaction.
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If Co is the initial concentration of the reactant following first order reaction and Cnis the concentration left after n halves, what is the relationship between Co and Cn?


 The relationship between Co and Cn is Cn = Co2n.
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Predict the value of rate constant k if temperature approaches to ∝ Is the value physically reasonable?

k = Ae–Ea/RT
If T → ∝ , Ea = 0 then k = A which is not possible.
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