1.

For a reactionA + B to 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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1
`3//2`
`4//3`

SOLUTION :` A + B to 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)
`3 = 9^(beta)` or `3 = 3^(2 beta)` or , `2 beta = 1` or ` beta = 1//2`
`therefore` Order of the REACTION = ` 1+ (1)/(2) = (3)/(2)`.


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