1.

The rate constant (K) for the reaction2A + B toProduct was found to be 2.5 xx 10^(-5) litre mol^(-1) sec^(-1) after 15 sec , 2.60 xx 10^(-5) litre mol^(-1) sec^(-1) after 30 sec and 2.55 xx 10^(-5) litre mol^(-1) sec^(-1) after 50 sec . The order of reaction is

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Solution :By OBSERVING the UNIT of RATE constant `MOL^(1-N) "litre"^(n-1) "sec"^(-1) = mol^(-1) "litre" sec^(-1)`
1 - n= `-1 implies n = 2`


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