Gaseous reaction $A \to B + C$ follows first-order kinetics concentration of $A$ changes from $1 M$ to $0.25 M$ in 138.9 min. Find the rate of reaction when conc. of $A$ is $0.1 M$ .

10^{- 2} M m i n^{- 1}

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10^{- 3} M m i n^{- 1}

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10^{- 4} M m i n^{- 1}

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10^{- 5} M m i n^{- 1}

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Solution

The correct option is B $10^{- 3} M m i n^{- 1}$
$r = k [A]$
$= \frac{0.693}{69.3} \times 0.1$
$= 10^{- 3} M m i n^{- 1}, t_{1 / 2}$
$= 69.3 m i n .$

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Gaseous reaction A→B+C follows first-order kinetics concentration of A changes from 1 M to 0.25 M in 138.9 min. Find the rate of reaction when conc. of A is 0.1 M.

The correct option is B 10−3M min−1r=k[A]=0.69369.3×0.1=10−3Mmin−1,t1/2=69.3min.

Gaseous reaction $A \to B + C$ follows first-order kinetics concentration of $A$ changes from $1 M$ to $0.25 M$ in 138.9 min. Find the rate of reaction when conc. of $A$ is $0.1 M$ .

The correct option is B $10^{- 3} M m i n^{- 1}$
$r = k [A]$
$= \frac{0.693}{69.3} \times 0.1$
$= 10^{- 3} M m i n^{- 1}, t_{1 / 2}$
$= 69.3 m i n .$