Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

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.

(a)
(a)The rate i.e., dx / dt depends on the concentration of the reactan

The rate i.e., dx / dt depends on the concentration of the reactant. Let dx / dt = k[A]¹.
On taking log
$log dx over dt space equals space log space straight K space plus space 1 space log space straight A$
On plotting log dx / dt versus log A is always a straight line with slope equal to 1.
(b) Example of a first order reaction.
Decomposition of nitrogen pentoxide (N₂O₅)
$2 straight N subscript 2 straight O subscript 5 left parenthesis straight g right parenthesis space rightwards arrow space space 2 NO subscript 2 left parenthesis straight g right parenthesis space plus space 1 half straight O subscript 2 left parenthesis straight g right parenthesis space space space space space Rate space equals space straight k left square bracket straight N subscript 2 straight O subscript 5 right square bracket$

248 Views

102. A possible mechanism for the reaction

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

120 Views

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

437 Views

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 .

189 Views

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} .

126 Views

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}

102 Views

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?

166 Views

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

117 Views

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 .

154 Views

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?

131 Views