In countries nearer to polar region, the roads are sprinkled with $CaCl_{2}$. This is
Show Hint
- to minimise the wear and tear of the roads
- to minimise the snow fall
- to minimise pollution
- to minimise the accumulation of dust on the road
The Correct Option is A
Solution and Explanation
Adding a solute to a solvent results in the depression of the freezing point.
Step 2: Mechanism
$CaCl_2$ acts as a de-icing agent by lowering the temperature at which water freezes into ice.
Step 3: Impact
By keeping the water in liquid form or melting existing ice, it prevents road damage caused by ice expansion and ice-related accidents, thereby minimising wear and tear.
Final Answer: (a)
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