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Question

For a given reaction:
aA+bB+cCProducts
Here a,b,c are the stoichiometric coefficients
Choose the correct option:

A
The overall order of reaction is always equal to (a+b+c)
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B
Order of reaction w.r.t. to reactant A may or may not be equal to a
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C
Order of reaction w.r.t. to reactant B is always equal to b
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D
Order of reaction w.r.t. any reactant is always equal to (a+b+c)
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Solution

The correct option is B Order of reaction w.r.t. to reactant A may or may not be equal to a
For a given reaction:
aA+bB+cCProducts
By experiment,Rate of reaction (r):

r[A]x[B]y[C]z
Overall order of the reaction is :
(x+y+z)
x: Order w.r.t reactant A
y: Order w.r.t reactant B
z: Order w.r.t reactant C
Here ,
x,y,z are experimentally determined quantities
x may or may not be equal to a
y may or may not be equal to b
z may or may not be equal to c

So, overall order may or may not be equal to (a+b+c)


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