Which of the following change at equilibrium will shift reaction in backward direction:
`Fe^(3+)(aq)+SCN^(-)(aq)hArrFe(SCN)^(2+)(aq)`

Options

A. Addition of water
B. Addition of `KOH(aq)[Fe(OH)_(3)` is insoluble in water]
C. Addition of `NaNO_(3)(s)`
D. A and B both

Explanation

`Fe^(3+)(aq)+SCN^(-)(aq)hArrFe(SCN)^(2+)(aq)`
(A) For given Q `alpha` V `rArr` on addition of water `QgtK` reaction move backward
(B) `Fe^(+3)+3OH^(-)hArrFe(OH)_(3)(s)` reaction moves backward