Interpretation: The colorless substance which is liquid at
Concept Introduction: The melting point is defined as the temperature at which a solid substance starts melting. The boiling point is defined as the temperature of a liquid when its vapor pressure is equal to the atmospheric pressure. This is the temperature when liquid starts boiling and converts into vapor.

Answer to Problem 63A
Ethanol.
Explanation of Solution
From the given data, colorless substances are as follows:
Ethanol, neon, and water.
Here, the melting and boiling point of ethanol is
Here, water cannot be liquid at
Thus, the correct answer is ethanol.
Thus, ethanol is liquid at
Chapter 2 Solutions
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