Halogens are being used as fire extinguishers, mild antiseptic CFCs and many other organic chemicals, Which of the following halogen is used to kill the bacteria in drinking water.
Correct answer: C. Chlorine
- A. Bromine
- B. Fluorine
- C. Chlorine
- D. Iodine
Explanation
One of the easiest and cost effective way to clean water is to add some amount of chlorine into it. But if chlorine is added in excess then the water becomes unfit for consumption. So, when chlorinated water from treatment plants is disposed into rivers etc then it becomes harmful for aquatic species as excess of chlorinated water can lead to death of living beings. Hence, chlorine must be removed from water before releasing the water from water treatment plants into rivers, lakes or oceans.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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