Question

How is snow removed from roads during heavy snow fall at hill stations?

Answer 1

The snow in the hill stations can be removed by adding salt to the snow and letting it melt off. This is majorly because of a rule which lowers the melting point of the ice formed.
So, even at negative temperatures where ice is formed, the ice gets melted because of the phenomenon. Its attributed to lower of vapour pressure and this would be taken up in higher classes.

Answer 2

Answer:

As airflow causes water vapor to circulate in clouds, the water can get colder and, depending on the climate, may eventually freeze. Snow is actually many ice crystals accumulated through this cycle. As the snowflake gathers more ice crystals, it gets heavier. Eventually the snowflake will be heavy enough that the force of the airflow will no longer be able to keep it suspended in the clouds, so it falls from the cloud toward the Earth. All items with mass are affected by gravitational force from other items of mass. Gravity causes them to be attracted to each other. The larger the mass, the more force it can exert in this attraction. That is why a snowflake falls to the Earth, rather than the Earth being moved to the snowflake, but both items will be applying gravitational force on the other. Additional note: Snow also needs a sustained, cold environment in order to stay in its frozen state. If the climate is too warm, a snowflake will not form or if it does it can melt before it reaches the ground and becomes rain