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The activation energys of two reaction are $E_1 and E_2 (E_1 \gt E_2)$ . If the temperature of the system is increased from $ T_1 to T_2 $ , the rate constant of the reaction changes from $K_1 to K_2^1 $ in the first reaction and $ K_2 to K_2^1$ in second reaction, predict which of the following expression is correct ?

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Explanation

$ { K_1 ^ 1 \over K_1 } \gt { K_2 ^1 \over K_2 } $ $ log { K_1 ^1 \over K_1 } = { E_1 \over 2.303 R } \left[ { T_2 -T_1 \over T_1 T_2 } \right] , log { K_2^1 \over K_2 } = { E_2 \over 2.303 R } [ {T_2 - T_1 \over T_1 T_2 } ] $ $ Since E_1 \gt E_2 $ $ \therefore log { K_1 ^1 \over K_1 } \div log { K_2 ^1 \over K_2 } \gt 1 or { K_1^1 \over K_1 } \gt { K_2 ^1 \over K_2 }$

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The rate of reaction $ 2x + y --> Products $ . $ Rate = K[x]^2[y] $ . If x is present in large excess, the order of the reaction is

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Explanation

1 The rate is not depend upon the reactant present in excess

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$ CH_3 COOEt + H_2 O \rightarrow CHC_3 OOH + Et OH $ Order of reaction is .....

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Explanation

1

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In which of the following cases, does the reaction go farthest to completion ?

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Explanation

∵ higher the equilibrium constant , fastest the rate of reaction to completion.

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The activation energy of a reaction is zero. The rate constant of the reaction …

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Explanation

is nearly independent of temperature. $ Ea = 0 \therefore K = A.e ^ { -Ea /RT } = A.e ^ \circ = A $

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Which of the following is the fast reaction ?

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Explanation

$ 6 CO_2 + ^ 6 H_2 O \rightarrow C_6 H_{12} O_6 + 6 O_2 $

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Oxidation of oxalic acid by acidified $ KMnO_4 $ is an example of autocatalysis. It is due to which of the following ?

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Explanation

$ Mn^{2+} $

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What will be the order of the reaction if doubling the concentration of a reactant increases the rate by a factor of 4 and trebling the concentration of the reactant by a factor of 9 ?

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Explanation

2 $ 2 ^ n = 4 3^n = 9 $ $ \therefore n = 2 $

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If the half time for a particular reaction is found to be constant and independent of the initial concentration of the reactants then reaction is of ...

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Explanation

1

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The rate of reaction $ A + B + C \rightarrow Products $ is given by $ r = K[A][B]^o[C]$ . If A is taken in large excess, the order of the reaction would be

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Explanation

1

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