The second order rate constant is usually expressed as :

M o l L s^{- 1}

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M o l^{- 1} L^{- 1} s^{- 1}

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M o l L^{- 1} s^{- 1}

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M o l^{- 1} L s^{- 1}

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Solution

The correct option is D $M o l^{- 1} L s^{- 1}$
As we know,
for second order reaction:
$r = k [A]^{2}$
so unit of rate constant is $M o l^{- 1} L s^{- 1}$ .

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Similar questions

Q. Identify the order of the reaction from the following rate constants respectively
a.

k = 7.06 \times 10^{- 3} {mol}^{- 1} {L s}^{- 1}

k = 5.60 \times 10^{- 5} s^{- 1}

k = 1.25 \times 10^{- 2} {mol L}^{- 1} s^{- 1}

k = 1.25 \times 10^{- 2} {mol}^{- 2} L^{2} s^{- 1}

Q. The unit ,

m o l L^{- 1} s^{- 1}

is meant for the rate constant of the reaction having the order :

Q. If the unit of rate constant of a reaction is

m o l^{- 1} L S^{- 1}

then mention its order.

Q. The plot of

t_{1 / 2} v / s [R]_{0}

for a reaction is a straight-line parallel to x-axis. The unit for the rate constant of this reaction is:

The rate of a first-order reaction is $0.04 m o l^{- 1} s^{- 1}$ at 10 seconds and 0.03 $m o l^{- 1} s^{- 1}$ at 20 seconds after initiation of the reaction. The half-life period of the reaction is

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The second order rate constant is usually expressed as :

The correct option is D Mol−1Ls−1As we know,for second order reaction:r=k[A]2so unit of rate constant is Mol−1Ls−1.

The correct option is D $M o l^{- 1} L s^{- 1}$
As we know,
for second order reaction:
$r = k [A]^{2}$
so unit of rate constant is $M o l^{- 1} L s^{- 1}$ .