I found the quiz interesting and stimulating to know more in the field of stoichiometry.
I doubt some of the answers aren't correct.
1) same osmotic pressure----isn't it isotonic ??
2) colligative property --- does it depend on constitution of the solute??
3) calorific value --- isn't it heat of combustion??
4) total vapor presssure for ideal solution - isn't it linear. (might be a little curved for solutions of positve or negative deviation)
I might be wrong too. Please check once and correct me.