When the vapor pressure of a liquid is equal to the atmospheric pressure, the liquid a. has no observable changes. c. evaporates. b. boils vigorously. d. begins to boil.

the answer is a

Explanation:

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When the vapor pressure of a liquid is equal to the atmospheric pressure, the liquid begins to boil.

Option - d

Explanation:

The pressure on the liquid reduces the quantity of pressure on liquid caused by the atmosphere. The liquid becomes vapor and mixes in the air. The water begins to boil when the vapor pressure of a liquid is equal to the atmospheric pressure.

Whenever the vapor pressure equals the atmospheric pressure, the liquid starts to boil. In effect, the liquid molecules gain the ability to get distributed and convert from liquid to gaseous phase without any external pressure. The gas which exists as bubbles in the liquid, will get raised outward on the surface and get released into the atmosphere.

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