The Importance and Dangers of Chlorine

Chlorine is a significant chemical element with the atomic number 17, represented by Cl. It is a yellow-green gas at room temperature and is widely used as a disinfectant. Chlorine's most common compound is sodium chloride (NaCl), known as common salt, which has been used since ancient times. Another important compound is hydrochloric acid, used in various industries despite its corrosive nature. Chlorine has beneficial uses but can also be dangerous, as seen in its use as a chemical weapon during World War I.

What is the atomic number of chlorine?

• 16

• 18

• 15

• 17

Which compound is commonly known as table salt?

• Sodium chloride

• Calcium chloride

• Magnesium chloride

• Potassium chloride

What is a saline solution?

• A solution with small amounts of salt dissolved in water

• A solution with high sugar content

• A solution with high acid content

• A solution with dissolved gases

What is another name for hydrochloric acid?

• Muriatic acid

• Acetic acid

• Nitric acid

• Sulfuric acid

What was chlorine gas used for during World War I?

• As a building material

• As a food preservative

• As a chemical weapon

• As a fuel