Boiling point of a liquid on hill station like shimla is lower than that in delhi . Why
boiling point is the temperature at which the vapor pressure of the liquid will be equal to that of atmospheric pressure of that place.
As atmospheric pressure at Shimla is less than that of Delhi so, lower temperature is required in Shimla to attain the vapor pressure equals to the atmospheric pressure of that place.
So, boiling point of water is lower in Shimla than in Delhi.
The boiling point on Shimla is lower than in Delhi as Shimla is situated at a higher altitude than Delhi so it has lesser atmospheric pressure and that's why water has a lowered boiling point there. The boiling point decrease s with decrease in pressure. If you put water in vaccum it will boil at 0°C. Hope this helps