A. Salt
B. Chlorine
C. Carbon dioxide
D. Water
A. Salt:
Salt, typically in the form of sodium chloride (NaCl), is commonly used to melt ice on roads during winter in cold countries. When salt is spread on icy roads, it lowers the freezing point of water, causing the ice to melt and preventing further ice formation. This process is known as freezing point depression.
B. Chlorine:
Chlorine is not typically used to melt ice on roads. Chlorine is a chemical element often used for disinfection purposes in water treatment, swimming pools, and as a bleach. While it has certain industrial applications, it is not commonly used for de-icing roads.
C. Carbon dioxide:
Carbon dioxide (CO2) is a colorless gas that does not directly melt ice. However, carbon dioxide can indirectly contribute to the melting of ice through processes such as dry ice blasting. Dry ice, which is solid carbon dioxide, can be used to remove ice by rapidly sublimating (turning from solid directly to gas), creating a cooling effect that can cause ice to loosen and break away.
D. Water:
Water itself is not typically used to melt ice on roads during winter. Water would freeze at cold temperatures, making the situation worse rather than melting the ice. However, water can be used in combination with other substances like salt to create brine solutions, which are sprayed or spread on icy roads to accelerate the melting process.
In summary, while salt is the most commonly used substance to melt ice on icy roads during winter, the other options have different applications and are not typically used for this purpose.
while salt is the most commonly used substance to melt ice on icy roads during winter, the other options have different applications and are not typically used for this purpose.
In cold countries, ice on frozen roads and footpath is melted by spraying
a) NaCl b) CaCl2 c) both a& b
Pls send the answer
NaCl
I think CaCl2 is right option. if you’re using table salt, also known as sodium chloride (NaCl), to melt ice, the salt will dissolve into separate sodium ions and chloride ions. Often, however, cities use calcium chloride (CaCl2), another type of salt, on their icy streets.
Road salt, i.e NaCl
Salt is used for increasing freezing point.how is possible that salt is mixed for melting ice on road.?
Usman please tell us the right answer
The answer is in your question. When we increase freezing point it will melt at certain temperature… Suppose water freezing point is 0 if we raise to -5 it mean at -1 ice will start melting… It’s my opinion please correct if I’m wrong.
Table salt protect ice from melting ..the ice stores use nacl to protect ice from melting
salt increases the freezing point in negative. means it will take more time or more low temperature to freeze it like sea water.
by adding the salt vapour pressure decrease and boiling point incease and freezing point decrease
Sahi answer kia hy wo tu btao admin
salt is use to aviod melting of snow by decreasing freezing point . than how we use salt for melting.??
both NaCl and CaCl2
Road salt works by lowering the freezing point of water via a process called freezing point depression. The freezing point of the water is lowered once the salt is added, so it the salt makes it more difficult for water to freeze.
Salt melts ice and snow by lowering its freezing point. Salt is best put on the roads before they freeze or before the snow arrives. Then, as snow falls, the salt mixes with it, lowering its freezing point. The result is a brine solution, preventing subsequent ice forming.
salt is the correct option.
by adding the salt vapour pressure decrease and boiling point incease and freezing point decrease
Nacl is a completely wrong answer, bcz we all know that the table salt is used to increase freezing point. Then how it is possible to use Nacl as a road salt or for melting?
usually salt is used to slower the melting or to stop the ice from melting
Need concluding remarks from admin.
Liquid sodium chloride (brine) is an economical anti-icing and pre- treatment chemical. Magnesium Chloride and Calcium Chloride – These products can melt ice at lower temperatures than salt. Both chemicals in liquid form can be used for anti-icing. In its dry form, calcium chloride is used only as a de-icer.
Both NaCl and CaCl2 can be used for clearing the icy roads . The phenomenon being involved is freezing point depression, where the freezing point of the water is lowered beyond 0 degree centigrade , reducing the chances of water freezing into the ice.
Hope, it helps out!
Solution
Solid
(calcium chloride) Cacl2
is spread on the roads during winter season in cold countries to decrease the melting point of the ice
What is mixed to melt the ice on icy roads?
Rock salt or halite is the form of sodium chloride. Brine is a solution of water and salt has a lower freezing point than pure water putting salt or saltwater on ice that is near 0oC will cause it to melt.