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#3 | Factors Affecting Rate of Reaction

(Chemistry) > Chemical Kinetics

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In a catalytic reaction involving the formation of ammonia by Haber's process N_{2}+3H_{2} → 2NH_{3}, the rate of appearance of NH_{3} was measured as 2.5 x 10^{-4} mol L^{-1}S^{-1} The rate of disappearance of H_{2} will be

1. 2.5 x 10^{-4} mol L^{-1}S^{-1}

2. 1.25 x 10^{-4} mol L^{-1}S^{-1}

3. 3.75 x 10^{-4} mol L^{-1}S^{-1}

4. 15.00 x 10^{-4} mol L^{-1}S^{-1}

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Which of the following represents the expression for 3/4 th life of a first order reaction?

1. (k/2.303) log (4/3)

2. (2.303/k) log (3/4)

3. (2.303/k) log 4

4. (2.303/k) log 3

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For an endothermic reaction, where ΔH represents the enthalpy of the reaction in kJ/mol, the minimum value for the energy of activation will be

1. Less than ΔH

2. Zero

3. More than ΔH

4. Equal to ΔΗ

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In the formation or sulphur trioxide by the contact process,

2SO_{2}(g) + O_{2}(g) $\to $2SO_{3}(g)

The rate of reaction is expressed as d(O_{2})/dt = 2.5x10^{-4} mol L^{-1}sec^{-1}. The rate disappearance of (SO_{2}) will be

1. 5.0x10^{-4} mol L^{-1}sec^{-1}

2. 2.5x10^{-4} mol L^{-1}sec^{-1}

3. 3.75x10^{-4} mol L^{-1}sec^{-1}

4. 50.0x10^{-4} mol L^{-1}sec^{-1}

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The dissociation of H_{2}O_{2} is a first order reaction. The half life for '16 V H_{2}O_{2} is 30 min, calculate the time at which the solution is 1V H_{2}O_{2} ?

(1) 120 min.

(2) 90 min.

(3) 60 min.

(4) 150 min.

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