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Question

For a particular A+BC was studied at 25C. The following results are obtained.


[A] [B] [C]
(mole/lit) (moles/lit) (mole lit 1sec2)
9×105
1.5×102
0.06
9×105
3×103
0.012
3×1053×103 0.004
6×105 x 0.024

Then the value of x is :

A
6×103moleslitre1
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B
3×103moleslitre1
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C
4.5×103moleslitre1
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D
9×103moleslitre1
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Solution

The correct option is B 9×103moleslitre1
A+BC

rate=k[A][B]

Experiment 3&2 chosen for value of k as[B]is same in both

r3r2=0.0040.012=k[3×105][3×103][9×105][3×103]

k=1 using this rate constant value in finding x
r4r3=0.0240.004=k[6×105][x][3×105][3×103]

[x]=9×103

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