Which of the following is spread on icy roads to melt ice in cold countries?
A
Sodium bicarbonate
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B
Rock salt
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C
Sodium hydroxide
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D
None of these
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Solution
The correct option is A Rock salt 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. It is called as de-icing done after snowstorm to improve traction.