NEET UG CHEMISTRY MCQ: CHEMICAL KINETICS

1 Hard

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Understanding +4 | -1

For the chemical reaction

{A} \rightarrow \text{products},

the rate of disappearance of

{A}

is a given by

r_{{A}}=-\frac{{d} C_{{A}}}{{d} t}=\frac{K_1 \cdot C_{{A}}}{1+K_2 \cdot C_{{A}}}

At low concentration of

{A},

expressed as

C_{{A}},

the reaction is of the first-order with the rate constant

View answer and explanation

Correct option: B

K_1

Option B (

K_1

) is correct because at low concentrations of A, the term

K_2 \cdot C_A

becomes negligible, simplifying the rate expression to

r_A = K_1 \cdot C_A

, which is first order.

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