CBSE Class 9 Answered
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
Asked by anusha | 11 Sep, 2013, 12:38: PM
Expert Answer
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.
So the correct option is a)To reduce error due to atmospheric pressure.
Answered by Vaibhav Chavan | 11 Sep, 2013, 03:18: PM
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