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Question

The rate constant of reaction 2A+BC is 2.57×105 litre mole1 sec1 after 10 sec. 2.65×105 litre mole1 sec1 after 20 sec and 2.55×105litre. mole1 sec1 after 30 sec. The order of the reaction is:

A
0
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B
1
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C
2
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D
3
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Solution

The correct option is B 2
Units of rate constant are given by mol1nltn1sec1
where n= order of the reaction
From the given units, we get n=2.
Hence, given reaction is a 2nd order reaction.

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