Chemistry of Detergents and Surfactants in the Environment
Chemistry ⇒ Environmental Chemistry
Chemistry of Detergents and Surfactants in the Environment starts at 10 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Chemistry of Detergents and Surfactants in the Environment.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A river near a city receives untreated wastewater containing detergents. What are two possible environmental consequences for the river ecosystem?
Describe how surfactants can affect the permeability of biological membranes in aquatic organisms.
Describe how the structure of a surfactant molecule allows it to interact with both water and oil.
Describe one method by which the environmental impact of detergents can be reduced.
Describe the environmental impact of phosphates in detergents.
Describe the role of chelating agents in detergents.
Describe the role of micelles in the cleaning action of detergents.
A river near a city receives untreated wastewater containing detergents. What are two possible environmental consequences for the river ecosystem?
Which of the following is a biodegradable surfactant? (1) Linear alkylbenzene sulfonate (LAS), (2) Branched alkylbenzene sulfonate (BAS), (3) Sodium lauryl sulfate (SLS), (4) Nonylphenol ethoxylate
Which of the following is a cationic surfactant? (1) Sodium dodecyl sulfate, (2) Cetyltrimethylammonium bromide, (3) Polyethylene glycol, (4) Sodium stearate
Which of the following is a common method for removing surfactants from wastewater? (1) Filtration, (2) Biodegradation, (3) Distillation, (4) Sublimation
Which of the following is a nonionic surfactant? (1) Sodium dodecyl sulfate, (2) Polyethylene glycol, (3) Cetyltrimethylammonium bromide, (4) Sodium stearate
Fill in the blank: Surfactants that carry both positive and negative charges are called __________ surfactants.
Fill in the blank: Surfactants that do not ionize in water are called __________ surfactants.
Fill in the blank: The ability of a surfactant to lower the surface tension of water is measured by its __________.
Fill in the blank: The environmental persistence of a detergent is largely determined by its __________.
True or False: All surfactants are completely removed during conventional wastewater treatment.
True or False: Anionic surfactants are the most commonly used type in household detergents.
True or False: Nonionic surfactants do not ionize in water.
True or False: Surfactants can accumulate in the tissues of aquatic organisms.
