5. The hybridization of the central atom in SeF4 is: (A) sp (B) sp3 (C) d2 sp3 (D) d2 sp2 (E) dsp3

7. What statement about equilibrium is true? (A) When two opposing processes proceed at identical rates, the system is at equilibrium. (B) The equilibrium constant is independent of temperature. (C) An endothermic reaction shifts toward reactants when heat is applied. (D) Catalysts shifts the position of an equilibrium. (E) none of these