Question

2. Which of the following toxicant is found in the hydrosphere? (A) Nitrous oxide B Br Detergents (C) Sulphur dioxide (D) Ozone​

Answer 1

Answer:

c

Explanation:

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Answer 2

(A) Nitrous oxide is the toxicant found in the hydrosphere.

• The hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air.
• (A) Nitrous oxide is produced naturally on land by bacteria in soils and in the water, especially in oceans. Having been found in the atmosphere for millions of years, nitrous oxide is a primary mechanism to control ozone in the stratosphere. Thus, its presence is a major reason why the amount of ozone, which helps to keep harmful ultraviolet radiation away from humans, has decreased over recent times. Nitrous oxide is one of the major greenhouse gases. Nitrogen dioxide gas reacts with water to produce nitric acid and nitrogen monoxide. This reaction happens very easily in water. Thus, making it toxic.
• (B) Br Detergents: Bromine is found naturally in the earth’s crust and in seawater in various chemical forms. Br detergents can also be found as an alternative to chlorine in swimming pools. That is, not toxic at all.
• Sulfur dioxide is a colorless gas or liquid with a strong, choking odor. It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores (aluminum, copper, zinc, lead, and iron) that contain sulfur, not in the hydrosphere.
• Ozone: The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere around 15–30km above the earth's surface. It covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B (UV-B) radiation from the sun.

So, (A) Nitrous oxide is the toxicant in the hydrosphere among all.