Please help ? What is NOT true of a reaction that is at equilibrium

CO(g)+2H2(g)<——->CH3 OH(g)

A. It is a symbolized by a double<—> arrow symbol

B. The rate of the forward and reverse reactions are equal

C. The concentrations of products and reactants are equal

D. There is no net change in the concentration of the reactants or products the concentration of reactants and products are constant

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.