CBSE - IX - Chemistry - Matter in Our Surroundings
To determine th boiling point of water in lab, it is advised to put the bulb of thermometer in the steam rather than n water, it is to: a)reduce error due to atmospheric pressure b)make sure that boiling point obtained is accurate even when water sample contains non-volatile impurities dissolved c)reduce the error due to expansion of glass because of heat d)obtain the boiling point in shorter time
Boiling occurs when the vapor pressure of a liquid equals the atmospheric pressure above that liquid.
So, depending on the atmospheric pressure, a liquid can have many boiling points.
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