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Beating confusion: The power of association

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1) With increase in frequency, energy of electromagnetic waves increases or decreases 2) Molarity is Often students confuse between molarity and molality. 3) In positive deviation from Raoult's Law, Solute-Solvent Interaction is strong or weak Students often confuse with these kinds of answers, when there is a dichotomy. It's nothing to do with the understanding of the subject, it's about memory. Students confuse because they have not formed enough association with main concepts . Eliminating these confusion requires memory tricks. Let's work with the first two example: The third one I leave to students or teachers to design so that they can memorize it.  In positive deviation, there will be more vapor pressure, this is only possible when solute-solvent interaction is weak. Weak intermolecular force means more particles in the gas phase.