NEET UG CHEMISTRY MCQ: CHEMICAL KINETICS

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Analyzing +4 | -1

The inversion of cane sugar proceeds with half-life of 500 minute at

\mathrm{pH}=5

for any concentration of sugar. However, if

\mathrm{pH}=6,

the half-life changes to 50 minute. The rate law expression for the sugar inversion can be written as

View answer and explanation

Correct option: D

r=K[\text{sugar}]\left[\mathrm{H}^{+}\right]^{-1}

The correct answer is D (

r=K[\text {sugar}][\mathrm{H}^{+}]^{-1}

) because the half-life is inversely proportional to the hydrogen ion concentration, indicating a negative first-order dependence on [H+].

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