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Standard XII

Physics

Magnetic Moment

The rate cons...

Question

The rate constant is numerically the same for 3 reactions 1st , 2nd and 3rd order respectively.Which one is true for rate of 3 reactions, if the concentration of reactant is greater than 1 mole?

A. r1=r2=r3
B.r1>r2>r2
c.r1<r2<r3
d.all the above

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Solution

According to kinetic theory ,
Rate of first order reaction , r₁ = K₁[A]¹
Rate of 2nd order reaction , r₂ = K₂[A]²
Rate of 3rd order reaction , r₃ = K₃[A]³

A/C to question,
K₁ = K₂ = K₃ = K [ numerically, rate constant are same ]
And [A] > 1 M
So, [A]³ > [A]² > [A]
So, r₃ > r₂ > r₁

Hence, c is correct

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The rate constant is numerically the same for 3 reactions 1st , 2nd and 3rd order respectively.Which one is true for rate of 3 reactions, if the concentration of reactant is greater than 1 mole? A. r1=r2=r3 B.r1>r2>r2 c.r1<r2<r3 d.all the above

The rate constant is numerically the same for 3 reactions 1st , 2nd and 3rd order respectively.Which one is true for rate of 3 reactions, if the concentration of reactant is greater than 1 mole?

A. r1=r2=r3
B.r1>r2>r2
c.r1<r2<r3
d.all the above