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Zero Order Reaction

For reaction ...

Question

For reaction $A \to B$ , rate constant of reaction at $27^{\circ} C$ is $1.2 \times 10^{- 3}$ $M s^{- 1}$ . The only correct graph for the reaction is,

A

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B

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C

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D

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Solution

The correct option is A
$k = 1.2 \times 10^{- 3} M s^{- 1}$
For zero order reaction, Unit of $k = M S^{- 1}$
$∴$ It is zero order reaction
$A_{t} = A_{0} - k t$
Rate $= k [A]^{\circ} = k =$ constant
$\Rightarrow A_{t} = A_{0} - x We know B_{t} = x = k t So, A_{t} = A_{0} - B_{t} A_{t} = A_{0} - B_{t} o r [A] = A_{0} - [B] y = c + m x ∴ m = - 1 c = A_{0}$

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