JAMB - Chemistry (1999 - No. 24)

X + Y → Z. The rate equation for the chemical reaction above is \(\frac{-Δx}{Δt}\) = K[X]\(^2\)[Y].
The overall order of the reaction is?
0.0
1.0
2.0
3.0

Explanation

The overall order of a reaction is the sum of the exponents in the rate law. 

The rate equation is  \(\frac{-Δx}{Δt}\) = K[X]\(^2\)[Y].

The exponent for [X] = 2

The exponent for [Y] = 1

The overall order is the sum of the exponents = 2 + 1 = 3

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