Physics
Answer
When we add salt to ice, the ice starts melting faster because salt mixes with the thin layer of water present on the surface of the ice and makes it harder for the water to freeze again. As a result, the ice melts even if the temperature is below it's freezing point. This is why people put salt on icy roads in cold countries — it helps melt the ice and makes the roads less slippery.
Related Questions
Why do ice cubes take on a particular shape?
What is the ideal temperature for freezing water to make ice cubes?
Fill in the blanks.
(a) …………… is anything that has mass and occupies space.
(b) The particles of matter are called …………… .
(c) Molecules are constantly …………… in all possible directions.
(d) Molecules have …………… between them.
Fill in the blanks.
(a) Arrange solids, liquids and gases in order of increasing intermolecular force.
…………… < …………… < ……………(b) …………… have a fixed shape and size.
(c) …………… have a fixed volume but no fixed shape.
(d) …………… have neither fixed shape nor volume.