JEE Main · 2019 · Shift-IIeasyCK-083

For a reaction scheme A k1 B k2 C, if the net rate of formation of B is set to be zero then the concentration of B is…

Chemical Kinetics · Class 12 · JEE Main Previous Year Question

Question

For a reaction scheme $\mathrm{A} \xrightarrow{k_1} \mathrm{B} \xrightarrow{k_2} \mathrm{C}$ , if the net rate of formation of B is set to be zero then the concentration of B is given by:

Options

a
$(k_1 + k_2)[\mathrm{A}]$
b
$k_1 k_2[\mathrm{A}]$
c
$\left(\frac{k_1}{k_2}\right)[\mathrm{A}]$
✓
d
$(k_1 - k_2)[\mathrm{A}]$

Correct Answerc

$\left(\frac{k_1}{k_2}\right)[\mathrm{A}]$

Detailed Solution

Net rate of formation of B: $\frac{d[\mathrm{B}]}{dt} = k_1[\mathrm{A}] - k_2[\mathrm{B}] = 0$ $[\mathrm{B}] = \frac{k_1}{k_2}[\mathrm{A}]$

Answer: Option (3)

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