Conisder the following elementary reaction,
`2A + B + C rarr` Products. All reactants are present in the gaseous state and reactant `C` is taken in excess.
How will the rate change if the concentration of A is doubled and that of B is tripled ?

Options

A. The rate increases `12` times of original value.
B. The rate increases `8` times of original value.
C. The rate reduces `12` times of original value.
D. The rate reduces `8` times of original value.

Answer

A

Explanation

`r_(1)=k[A]^(2)[B]`
`r_(2)=k[2A]^(2)[3B]`
`(r_(2))/(r_(1))= 12impliesr_(2)= 12r_(1)`