The rate constant (K) for the reaction, 2A+B→ Product was found to be 2.5×10−5 litre mol−1sec−1 after 15 sec, 2.60×10−5litremol−1sec−1 after 30 sec and 2.55×10−5litremol−1sec−1 after 50 sec. The order of reaction is:
A
2
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B
3
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C
0
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D
1
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Solution
The correct option is A2 The order of reaction is 2.
K does not change with time; thus its value remains unchanged during the reaction.
By seeing the equation, it can be said that reaction is a third order but the unit of K suggest it to be 2nd order.