Barrons SAT Subject Test Chemistry, 13th Edition

33. (C) The rise in the boiling point depends on the number of particles in
    solution. One mole of CaCl 2 gives 3 mol of ions, more than any other
    substance listed:

CaCl 2 → Ca2+ + 2Cl−.

The number of moles of dissolved particles given by the other

substances are as follows:

(A) = 2, (B) = 2, (D) = 1, (E) = 1.