The correct answer is: A. Chlorine
Chlorine is a pale yellow-green gas at standard temperature and pressure. It is an extremely reactive element and is the second most abundant halogen. Chlorine is used in a variety of industrial processes, including the production of plastics, pesticides, and bleach. It is also used in water treatment to disinfect drinking water.
Oxygen is a colorless, odorless, tasteless gas that is essential for life. It is the most abundant element in the Earth’s atmosphere, making up about 21% of the air. Oxygen is also found in water and in the Earth’s crust. It is used in a variety of industrial processes, including the production of steel, glass, and paper. It is also used in medical applications, such as in the treatment of asthma and other respiratory problems.
Phosphorus is a non-metallic chemical element that is found in nature in a variety of forms, including white phosphorus, red phosphorus, and black phosphorus. White phosphorus is a waxy, white solid that is highly flammable. Red phosphorus is a red, amorphous solid that is less flammable than white phosphorus. Black phosphorus is a black, crystalline solid that is the most stable form of phosphorus. Phosphorus is used in a variety of industrial processes, including the production of fertilizers, pesticides, and matches. It is also used in medical applications, such as in the treatment of cancer.
Sulphur is a non-metallic chemical element that is found in nature in a variety of forms, including elemental sulphur, sulfur dioxide, and sulfuric acid. Elemental sulphur is a yellow, crystalline solid that is found in deposits around the world. Sulfur dioxide is a colorless, odorless gas that is produced when sulfur is burned. Sulfur dioxide is also a major component of acid rain. Sulfuric acid is a strong, corrosive acid that is used in a variety of industrial processes, including the production of fertilizers, detergents, and batteries.