Question

Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then, the remaining liquid is heated to remove the water, leaving substance B. Which statement about substance A and substance B could be correct?

Substance A is rice, and substance B is sugar.

Substance A is salt and substance B is also salt.

Substance A is alcohol, and substance B is salt.

Substance A is sodium and substance B is chloride; they had reacted together as sodium chloride.

choose the correct answer

Answer 1

The correct answer is:

**Substance A is alcohol, and substance B is salt.**

Here's why:

- In this scenario, mixing substances A and B, adding water, and filtering allows for the separation of substance A (alcohol) because alcohol is soluble in water, while salt (substance B) is not. After filtering out the alcohol, the remaining liquid (which contains dissolved salt) can be heated to remove the water, leaving behind solid salt.

The other options either do not make sense in the context of the given separation process or involve substances that do not behave in the described manner.