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Which of the following can be obtained by the process of crystallization, when a solution is left undisturbed for a long period of time and then allowed to evaporate to obtain pure crystals?1 pointa. Pure iron oxide (rust)b. Pure glasswarec. Crude table saltd. Crushed coffee powder

Question

Which of the following can be obtained by the process of crystallization, when a solution is left undisturbed for a long period of time and then allowed to evaporate to obtain pure crystals?1 pointa. Pure iron oxide (rust)b. Pure glasswarec. Crude table saltd. Crushed coffee powder

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Solution

The process of crystallization is often used to purify substances, particularly when it comes to salts. When a solution is left undisturbed for a long period of time and then allowed to evaporate, the solute will often form into pure crystals.

Looking at the options:

a. Pure iron oxide (rust) - This is not typically obtained through crystallization. Iron oxide forms through a chemical reaction between iron and oxygen, not through the evaporation of a solution.

b. Pure glassware - Glassware is made from silica, not from a solution that can be crystallized.

c. Crude table salt - This is the correct answer. Table salt, or sodium chloride, can be obtained through the process of crystallization. When a solution of salt water is left to evaporate, the salt will form into crystals.

d. Crushed coffee powder - Coffee is not made through a process of crystallization. It is made by roasting and grinding coffee beans.

So, the answer is c. Crude table salt.

This problem has been solved

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