If all the following liquids are at the same temperature, then the liquid having the least vapor pressure will be:

Answer: Heptane (C₇H₁₄)
Explanation

Among the listed liquids, heptane (C₇H₁₄) has the greatest molecular weight

Thus the strongest intermolecular forces, lead to the lowest vapor pressure at the same temperature

This question appeared in Past Papers (3 times)
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EVERYDAY SCIENCE (2 times)

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