Question

Water is often treated with chlorine to:
A. increase oxygen content
B. kill germs
C. remove suspended particles
D. remove hardness

Answer 1

Hint: Chlorine is a chemical element present in the periodic table with the symbol denoted by Cl and it's atomic number is 17. It is the second-lightest among the halogens, it is placed between fluorine and bromine in the periodic table and its properties are mostly intermediate between fluorine and bromine . Chlorine is a greenish yellow gas which is found at room temperature.

Complete step by step answer:
Chlorine kills bacteria – it's a disinfectant. It's wont to treat beverage and athletic facility water. It's also accustomed to make many consumer products from paper to paints, and from textiles to insecticides. About $20\%$ of chlorine produced is employed to form PVC.
Chlorine is usually used as an antiseptic and is employed to form beverage safe and to treat swimming pools. Huge amounts of chlorine are needed in many industrial processes, like inside the production of dyes, plastics, paper and its products, textiles, antiseptics, medicines, insecticides, solvents and paints.
However, if there is excessive exposure to chlorine then it may cause injuries and sickness, including coughing, rashes, throat as well as nose pain, irritation of the eye and bouts of asthma, health experts warn. Instructions for safely chlorinating a pool usually need a maximum of 4 parts per million when people are within the pool.

So (B) is the correct option.

Note: Chlorine may be a respiratory irritant, and inhaling it should cause pulmonary edema — an excessive buildup of fluid within the lungs that may result in breathing difficulties. The gas may also cause eye and skin irritation, or perhaps severe burns and ulcerations, in line with the big apple State Department of Health.