Chemical Kinetics and Nuclear ChemistryHard

Question

A → products (First order reaction).

Three sets of experiment were performed for a reaction under similar experimental conditions.

Run $1 \Rightarrow 100\text{ }mL$ of 10 M solution of reactant A

Run $2 \Rightarrow 200\text{ }mL$ of 10 M solution of reactant A

Run $3 \Rightarrow 100\text{ }mL$ of 10 M solution of reactant $A +$ 100 mL of $H_{2}O$ added.

The correct variation of rate of reaction is

Options

A.Run $1 =$ Run $2 =$ Run 3
B.Run $3 <$ Run $1 =$ Run 2
C.Run $3 <$ Run $1 <$ Run 2
D.Run $1 <$ Run $2 <$ Run 3

Solution

For I $\ ^{\text{st~}}$ order reaction

Rate $= k\lbrack A\rbrack$

with decrease in concentration of A , rate of reaction decreases.

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