1.

For a reaction A+B rarr C+D if the concentration of A is doubled without altering the concentration of B, the rate gets doubled. If the concentration of B is increased by nine times without altering the concentration of A, the rate gets tripled. The order of the reaction is

Answer»

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`3//2`
`4//3`

Solution :`A+B rarr C+D`
`r=K[A]^(alpha)[B]^(beta) ""`….(i)
`2r=K[2A]^(alpha)[B]^(beta) ""`….(ii)
`3r=K[A]^(alpha)[9B]^(beta) ""`…..(iii)
Dividing eqn.(ii)by eqn.(i)
`2=2^(alpha)`or,`alpha =1`
Dividing eqn.(iii)by eqn.(i)
`3=9^(beta)`or,`3=3^(2beta)`or,`2beta =1`or,`beta = 1//2`
`therefore`ORDER of the REACTION `=1+(1)/(2)=(3)/(2)`.


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