Dental Admissions Test (DAT) Practice Test

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Practice this question and more.

Which of the following is a strong electrolyte?

  1. Acetic acid (CH3COOH)

  2. Table sugar (sucrose)

  3. Sodium chloride (NaCl)

  4. Carbon dioxide (CO2)

The correct answer is: Sodium chloride (NaCl)

A strong electrolyte is a substance that dissociates completely into ions when dissolved in water. This means that it conducts electricity well, making it a strong conductor. In this question, acetic acid and table sugar are weak electrolytes as they partially dissociate in water. On the other hand, carbon dioxide is a non-electrolyte as it does not dissociate into ions at all. Only sodium chloride, commonly known as table salt, is a strong electrolyte. So, it is the best option among the given choices.

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