MHT CET Chemistry question

The unit of the rate constant for first order reaction is

Answer: (B)

Solution

For a first order reaction k = \frac{rate}{[A]} = \frac{\mathrm{mol\,dm^{-3}\,s^{-1}}}{\mathrm{mol\,dm^{-3}}} = \mathrm{s^{-1}}; the units

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Question ID VK-069262