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Question

The reaction A + 2B + C 2D + E is found to be 1, 2 and Zero order with respect to A,B and C respectively. What will be the final rate, if concentration of each reactant is doubled?

A
2 times
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B
4 times
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C
8 times
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D
16 times
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Solution

The correct option is B 8 times
The given reaction is:
A+2B+C2D+E

According to question,
Rate=K[A]1[B]2[C]0 (i)
where, K is rate constant

Now, if the concentration of each reactant is doubled then,
(Rate)new=K[2A]1[2B][2C]0
=K.2[A]1.4[B]2.2[C]0

(Rate)new=8.K[A]1[B]2[C]0 (ii)

Now, Dividing (ii) by (i) :-
(Rate)newRate=8

So, the final rate will be 8 times to that of initial.

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