Which of the following parameter can be used in the measurement of the speed of a reaction?

Pressure

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Concentration

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Volume of gas given off

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Particle size

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Solution

The correct option is D Volume of gas given off
The speed of a chemical reaction may be defined as the change in concentration of a substance divided by the time interval during which this change is observed.

Rate $= \frac{Δ c o n c e n t r a t i o n}{Δ t i m e}$

The speed of a chemical reaction may be defined as the volume of gas given off if gas is formed and present at the product side.

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