Answer:
Normal boiling point is a standard boiling point at sea level highet that is 100 c°
but the temperature at which water boils may vary with different factors like increasing pressure in pressure cooker.
And it decreases with increase in height.
Explanation:
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it. The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere (760 torr).