B since Oxygen is more electronegative, meaning they have a strong stronger pull on the electrons creating poles
Netural atoms lose electrons or gain electrons to form ions. Either positive or negative ions.
Positive ions:
Na ---> Na+ + e-
Negative ions:
Cl + e- ---> Cl-
Water is an essential part of life and its availability is important for all living creatures. On the other side, the world is suffering from a major problem of drinking water. There are several gases, microorganisms and other toxins (chemicals and heavy metals) added into water during rain, flowing water, etc. which is responsible for water pollution. This review article describes various applications of nanomaterial in removing different types of impurities from polluted water. There are various kinds of nanomaterials, which carried huge potential to treat polluted water (containing metal toxin substance, different organic and inorganic impurities) very effectively due to their unique properties like greater surface area, able to work at low concentration, etc. The nanostructured catalytic membranes, nanosorbents and nanophotocatalyst based approaches to remove pollutants from wastewater are eco-friendly and efficient, but they require more energy, more investment in order to purify the wastewater. There are many challenges and issues of wastewater treatment. Some precautions are also required to keep away from ecological and health issues. New modern equipment for wastewater treatment should be flexible, low cost and efficient for the commercialization purpose.
Explanation:
When two or more substances are mixed together in such a way that their particles are evenly distributed throughout the mixture then it is known as a solution.
Basically, a solution is a homogeneous mixture which can be present in any phase.
A solution contains both solute and solvent.
A colloid is defined as a substance in which solute particles are microscopically distributed throughout the solvent. In a colloid both solvent and solute are present in liquid phase.
Hence, a solution can be easily distinguished from colloids.
Therefore, we can conclude that following statements about solutions are true:
- They contain solutes and solvents.
- Their particles must be evenly distributed.
- They may contain solid, liquid, and gas simultaneously.
- They are always easy to distinguish from colloids.
- They are homogeneous matter.
Explanation:
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