1.

Fot the reaction A + B to produts, it is found that orders of the reaction in A and B are 1 and 2 respectively. When the conc. ofA is halved and that of B is doubled, the rate increases by a factor :

Answer»

2
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4
16

Solution :For the reaction, `A +B to` PRODUCTS,the rate law is
`(dx)/(dt)=r_1=k[A][B]^2`… (i)
`r_2 = k[1/2][2B]^2`…(ii)
`or r_2= 1/2xx2^2k[A][B]^2`…(iii)
Dividing (iii) by (i)
`(r_(2))/(r_(1)) = (2 k [A][B]^(2))/(k[A][B]^(2)) = 2 therefore r_(2) = 2r_(1)`


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