Which of the following chemical equations represents a redox reaction where two electrons were transferred?
о 2 G(s) + J2(8) 2 GJ(g)
O 2 NmX(aq) + L2(g) 2 NmL(aq) + X2(g)
O 2 SuA(s) 2 Su(g) + A2(g)
O HnL2(aq) + Nm2A(aq) HnA(s) + 2 NmL(aq)

Iron(iii) ions, fe3+ , react with thiocyanate ions, scn- , in a reversible reaction to form a red solution. which changes to the equilibrium will make the solution go red? i. increasing the temperature ii. adding fecl3 iii. adding a catalyst a. i and ii only b. i and iii only c. ii and iii only d. i, ii and iii