Answer: Attenuation
Explanation: Natural attenuation: in this method, the natural physical, chemical, and biological processes in soil and water gradually break down contamination or pollutants into harmless components. It helps reduce contamination concentration and soil and water to acceptable levels. Examples of natural attenuation processes include
- dilution or dispersal of pollutants in moving water
- volatilization or reduction of pollutants into vapor
- absorption or attachment of balloons to soil or vegetation
These processes are accomplish naturally. Little or no human intervention is necessary.
In amino acids, the carboxyl group acts as an acid.
Answer: Option B
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Explanation:
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The molecular formula of the carboxyl group is -COOH. It is composed of one carbon atom bonded with oxygen atom and hydroxyl group.
During ionization process, it leads to the formation of two ions namely a positive ion called 
, whereas a negative ion called 
. Due to the formation of ions, which is nothing but a proton, the carboxyl group present in the amino acid act as an acid.
Answer: The use of water is increasing day by day and the amount of freshwater available for the daily use is less than 1%. There are thousands of activities going on in this 1 % of water only. There is a huge of amount of water present on earth but that cannot be used because of being salty. The use of water is a concern because most of the water is wasted that water is freshwater only. The water used for brushing, bathing, agriculture, etc is freshwater only. Water should be used in a sustainable manner to fulfill the demand of present generation and save for future generation because life is impossible without water.
