Q30 / 196 · NTA Abhyas (NEET) 2020 · Chemistry · Chemical Kinetics

For the elementary reaction $M \to N,$ the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is

A
4
Correct answer
B
3
C
2
D
1

Solution

R \propto [M]^{n}

R^{'} \propto {[2 M]}^{n} = 8 R

So n = 3.

Hence, the correct answer is option: 'B'.

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