Match the reaction quotients (Q) listed in coloumn II with the cell reaction listed in column I:

Answer

A-R, B-S, C-P, D-Q

Explanation

(A) `2Al+3Cu^(2+)rarr 2Al^(3+)+3Cu`,
`Q=([Al^(+3)]^(2))/([Cu^(2+)]^(3))=(0.1xx0.1)/(0.2xx0.2xx0.2)=1.25`
(B) `Cd_((s))+2Fe_((aq))^(3+)rarr Cd_((aq))^(2+)+2Fe_((aq))^(2+)`,
`Q=([Cd^(2+)][Fe^(2+)]^(2))/([Fe^(3+)]^(2))=(0.1xx0.1^(2))/(0.01^(2))=10`
(C ) `Cd_((s))+2Ag_((aq))^(+)rarr Cd^(2+)+2Ag_((s))` ,
`Q=([Cd^(2+)])/([Ag^(+)]^(2))=(0.01)/(0.1^(2))=1`
(D) `H_(2)(10atm)+2H^(+)(1M)rarr 2H_((aq))^(+)(0.1M)+H_(2)(1atm)`