Which of the following reasons explains why if salt water is heated, the water turns into steam while the salt remains? water and salt have an equal boiling point. water has a lower boiling point than salt. salt has a lower boiling point than water. salt and water have an equal melting point.

Option (b) is the correct answer.

Explanation:

When a solution of salt water is heated then on normal boiling we can make the water to evaporate from the solution. As a result, salt will be left behind.

As boiling point of water is lower than the boiling point of salt. Hence, water will evaporate easily from the solution.

This also means that the boiling point of salt is greater than the boiling point of water. Due to this salt remains when water evaporates.

Hence, we can conclude that water has a lower boiling point than salt best explains why if salt water is heated, the water turns into steam while the salt remains.

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