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chlorine

Primary Information
Secondary Information

Definition

Chlorine is a chemical element with the symbol Cl and atomic number 17.

It is a pale yellow-green gas at standard temperature and pressure.

Chlorine is a highly reactive element and is used in a variety of applications, including:

  • Water purification: Chlorine is used to kill bacteria and other microorganisms in drinking water.
  • Bleaching: Chlorine is used to bleach fabrics and paper.
  • Production of plastics: Chlorine is used to produce a variety of plastics, including PVC and polystyrene.
  • Chlorine is also a toxic gas and can be harmful to human health.

Chlorine is added to swimming pools in the form of chlorine tablets, granular chlorine, or liquid chlorine. The chlorine is then dissolved in the water and circulated throughout the pool. The amount of chlorine in a swimming pool needs to be regularly monitored and adjusted to maintain a safe level.

How can the word be used?

Chlorine is a chemical element with the symbol Cl and atomic number 17.

chlorine

Different forms of the word

Noun:

Singular: chlorine.

Plural: chlorines.

Adjective:

Chlorine: relating to or containing the chemical element chlorine.

Verb:

Chlorinate: to treat with chlorine.

Etymology

The word chlorine comes from the Greek word “khloros”, which means “greenish-yellow”. The word “khloros” is related to the word “chloros”, which means “yellowish-green”.

Question

Why is chlorine added to swimming pools?

AQA Science Exam Question and Answer

Question:

What is chlorine, and what are its primary uses in various scientific and industrial applications?

Answer:

Chlorine is a chemical element with the symbol Cl and atomic number 17. It is a highly reactive, greenish-yellow gas at room temperature and is part of the halogen group on the periodic table.

Chlorine has numerous important uses in various scientific and industrial applications. It is commonly used in water treatment to disinfect and purify drinking water, making it safe for consumption by killing harmful bacteria and microorganisms. Additionally, chlorine is a key ingredient in the production of a wide range of chemicals, including plastics, solvents, and pesticides. It is also used in the manufacturing of paper, textiles, and pharmaceuticals.

However, despite its essential applications, chlorine must be handled with care, as it can be toxic in high concentrations and poses health and environmental risks. Proper safety measures and handling protocols are crucial in its industrial and scientific use.