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Question:

Which has the highest boiling point?

0.1MNa2SO4

0.1MC6H12O6

0.1MMgCl2

0.1MAl(NO3)3

Solution:

The correct option is D 0.1MAl(NO3)3. The concentration of all the compounds is the same. Thus, the Van't Hoff factor will depend only on the number of ions. Al(NO3)3 ↔ Al³⁺ + 3NO₃⁻. The value of i is 4. The Al(NO3)3 solution forms the maximum number of ions, thus it has the highest boiling point. Hence, option D is correct.