Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoThermal ExpansionMedium2 minQB
PhysicsMediumassertion reason
Assertion: Ordinary ethanol often evaporates faster than water under comparable room conditions.
Reason: Water has zero vapour pressure at room temperature.
Options:
Answer:
C
Solution:
For ordinary drinking alcohol (ethanol), the saturation vapour pressure at room temperature is higher than for water. Under comparable surface area, airflow and vapour concentration this favours faster evaporation. The question uses alcohol in this usual sense; alcohol is a chemical family, so the statement is not true for every alcohol. Assertion is true, but Reason is false. Correct option: (C).
Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion
⏱ 2mℹ️ Source: QB
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