Question

When ethanol mixes in cyclohexane, it reduces the intermolecular forces between ethanol molecules. This liquid pair shows

• A. Positive deviation fromRaoult's law
• B. Negative deviation fromRaoult's law
• C. No deviation fromRaoult's law
• D. Decrease in volume

Answer 1

The correct option is A Positive deviation fromRaoult's law

Here B-B type of intermolecular forces between ethanol molecules is decreasing. Simultaneously pair doesn’t form any hydrogen bonding. Thus A-B type of interaction is weaker than A-A or B-B type of interaction and hence it shows positive deviation from Raoult’s law.