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Question

In the following reaction, $$A\rightarrow B$$, rate constant is $$1.2\times10^{-2}\:M\:s^{-1}\:$$. What is concentration of B after 10 min, if we start with 10 M of A?


A
7.2 M
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B
14.4 M
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C
3.6 M
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D
None of these
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Solution

The correct option is A 7.2 M
$$k=1. 2 \times 10^{–2}Ms^{–1}$$ 

Since unit of rate constant is $$Ms^{–1}$$, it is zero order
reaction
Rate law $$[B] = kt$$

At t = 10 min

$$[B] = 1. 2 \times 10^{–2} \times 10 \times 60\ M$$

$$[B] = 7. 2\ M$$

Chemistry

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