Question

2-At higher altitudes: (a)Boiling point of a liquid decreases (b)Boiling point of a liquid increases (c)No change in boiling point (d)Melting point of solid increases​

Answer 1

Option a is correct.

Because at higher altitudes, air pressure is lower.When atmospheric pressure is lower, such as at a higher altitude, it takes less energy to bring water to the boiling point. Less energy means less heat, which means water will boil at a lower temperature at a higher altitude.