Multiple choice

Why is salt is used to melt ice?

  1. To lower the freezing point of water.

  2. To increase the melting point of water.

  3. Both (1) and (2)

  4. To produce the heat by decomposition of salt molecules.
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A Correct answer
Explanation

Salt acts as anti-freeze. Water becomes ice at a temperature of 32 degrees Fahrenheit (0 degrees Celsius) and adding salt to water lowers the freezing point, thus preventing the formation of ice.

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