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Chemical Kinetics

Short Answer Type

121. For the reaction at 500 K

{NO}_{2} (g) + CO (g) \to {CO}_{2} (g) + NO (g)

The proposed mechanism is as follow:
(i)

{NO}_{2} + {NO}_{2} \to NO + {NO}_{3} (slow) {NO}_{3} + CO \to {CO}_{2} + {NO}_{2} (fast)

Predict the law?

126 Views

Long Answer Type

122. Write the overall reaction and the rate law from the following elementary reactions:

NO + {Br}_{2} ⇋ {NOBr}_{2} (fast) {NOBr}_{2} + NO \to 2 NOBr (slow)

What is the order of the reaction?

130 Views

Short Answer Type

123. Consider the reaction $A \overset{k}{\to} P .$ The change in concentration of A with time is shown in the following plot:
(i) Predict the order of reaction.
(ii) Derive the expression for the time required for the completion of the reaction.

(i) Zero order reaction.
(i) Zero order reaction.(ii) Rate

(ii) Rate

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rightwards double arrow space space space integral subscript open square brackets straight A close square brackets end subscript superscript open square brackets At close square brackets end superscript space minus space straight d open square brackets straight A close square brackets space equals space integral subscript 0 superscript straight t space straight k space dt

rightwards double arrow space space space space minus space open square brackets straight A close square brackets subscript open square brackets straight A close square brackets end subscript superscript open square brackets At close square brackets end superscript space equals space kt space plus space open square brackets straight C close square brackets rightwards double arrow space space space space space space space open square brackets straight A minus straight A subscript straight t close square brackets space equals space kt space plus space open square brackets straight C close square brackets rightwards double arrow space space space space space space space left square bracket straight A subscript straight t space minus space straight A right square bracket space equals space kt space plus space open square brackets straight C close square brackets rightwards double arrow space space space space space space space open square brackets straight A subscript straight t minus straight A close square brackets space equals space minus kt space minus space open square brackets straight C close square brackets rightwards double arrow space space space space space space space open square brackets straight A subscript straight t minus straight A close square brackets space equals space minus kt space plus space open square brackets straight A subscript 0 close square brackets rightwards double arrow space space space space space space space space space space open square brackets straight A close square brackets subscript straight t space equals space minus kt space plus space open square brackets straight A subscript 0 close square brackets

127 Views

124. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
PCl₅(g) → PCl₃(g) + Cl₂(g)

232 Views

125. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
2NO(g) + O₂(g) → 2NO₂(g)

172 Views

126. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
H₂(g) + l₂(g) → 2HI(g)

146 Views

127. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
CO(g) + NO₂(g) → CO₂(g) + NO(g)

193 Views

128. Express the rate of the following reaction in terms of disappearance of the reactants and appearance of products:
2NO₂(g) + F₂(g) → 2NO₂ F(g)

114 Views

129. The reaction:
2NO + Br₂ → 2NOBr
is supposed to follow the following mechanism.
(i)

NO + {Br}_{2} \overset{fast}{⇌} {NOBr}_{2}

(ii)

{NOBr}_{2} + NO \overset{slow}{\to} 2 NOBr

Suggest the rate law expression.

1259 Views

Long Answer Type

130. Nitric oxide, NO, reacts with oxygen to produce nitrogen dioxide,
2NO(g) + O₂(g) → 2NO₂(g)
What is the predicted rate law, if the mechanism is

247 Views

Previous Year Papers

Test Series

Test Yourself

Short Answer Type

Long Answer Type

Short Answer Type

123. Consider the reaction A →k P. The change in concentration of A with time is shown in the following plot:(i) Predict the order of reaction.(ii) Derive the expression for the time required for the completion of the reaction.

Long Answer Type

123. Consider the reaction $A \overset{k}{\to} P .$ The change in concentration of A with time is shown in the following plot:
(i) Predict the order of reaction.
(ii) Derive the expression for the time required for the completion of the reaction.