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Chemical Kinetics

Short Answer Type

101. (a)Show graphically how the rate of a first order reaction with only one reactant depends upon the concentration of the reactant.
(b) Give one example of a first order reaction.

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102. A possible mechanism for the reaction

If the second step is the rate determining step, what is the rate law for this reaction?

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103. Express the relationship between the rate of production of water and the rate of disappearance of oxygen in the following reaction:

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

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104. Express the relationship between the rate of production of NOCl and the rate of disappearance of chlorine in the following reaction:

$2 NO + {Cl}_{2} \to 2 NOCl .$

Rate of production of NOCl

= \frac{d [NOCl]}{dt}

Rate of disappearance of Cl₂

= \frac{- d [{Cl}_{2}]}{dt}

From the chemical equation, Rate of disappearance of Cl₂

= \frac{1}{2} \times Rate of formation of NOCl

∴

\frac{d [{Cl}_{2}]}{dt} = \frac{1}{2} \frac{d [NOCl]}{dt} .

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105. Explain the relationship between the rate of production of iodine and rate of disappearance of hydrogen iodide in the following reaction?

2 HI \to H_{2} + I_{2} .

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106. Explain the relationship between the rate of production of oxygen and the rate of disappearance of hydrogen peroxide (H₂O₂) in the following reaction:

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

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107. Starting with differential rate law equation for a first order reaction, derive the integrated rate law equation for a first order reaction. How is it related to the rate constant?

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108. What is the initial rate method for the determination of a reaction rate when more than one reactant is present?

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109. For the reaction:

3 H_{2} (g) + N_{2} (g) \to 2 {NH}_{3} (g)

express the rate of the reaction in terms of

- d [H_{2}] / dt, - d [N_{2}] / dt and d [{NH}_{3}] dt .

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110. For the reaction:
NO₂(g) + CO (g) → CO₂(g) + NO(g)
the experimentally determined rate expression between 440 K is rate = k[NO₂]². What mechanism can be proposed for the above reaction?

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

104. Express the relationship between the rate of production of NOCl and the rate of disappearance of chlorine in the following reaction:2NO+Cl2 → 2NOCl.

104. Express the relationship between the rate of production of NOCl and the rate of disappearance of chlorine in the following reaction:

$2 NO + {Cl}_{2} \to 2 NOCl .$