SCIENCE
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Topaz
|
|
|
Clay
|
|
|
Sugar
|
|
|
Salt
|
Detailed explanation-1: -Salt causes a phenomenon called freezing point depression, which means it lowers the freezing point of water. Water normally freezes at 32 degrees Fahrenheit, but when you add salt, that threshold can drop as low as 20 degrees Fahrenheit.
Detailed explanation-2: -Road salt, or sodium chloride, works by lowering the freezing point of water, causing ice to melt even when the temperature is below water’s normal freezing point of 32 degrees.
Detailed explanation-3: -So, why use salt on roads and other surfaces? It’s simple – salt lowers the freezing point of water, which prevents ice from forming. Interesting fact: road salt is simply rock salt, which is table salt in its natural form.
Detailed explanation-4: -Salt water is sprinkled in cold countries to remove ice on roads.