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 12
Describe one method for removing surfactants from wastewater.
Describe one way in which surfactants can enter the environment.
Describe the environmental impact of phosphates in detergents.
Describe the role of surfactants in oil spill remediation.
Describe the structure of a typical surfactant molecule.
Explain how detergents can affect the oxygen levels in aquatic environments.
A river near a city shows excessive algal growth and fish deaths. Which component in detergents is most likely responsible for this? (1) Phosphates, (2) Sulfates, (3) Chlorides, (4) Silicates
A sample of river water contains 0.5 mg/L of a non-biodegradable surfactant. If the safe limit is 0.2 mg/L, by what factor does the sample exceed the safe limit?
A river near a city shows excessive algal growth and fish deaths. Which component in detergents is most likely responsible for this? (1) Phosphates, (2) Sulfates, (3) Chlorides, (4) Silicates
Which of the following is a characteristic of a biodegradable detergent? (1) Contains branched alkyl chains, (2) Contains linear alkyl chains, (3) Contains heavy metals, (4) Contains phosphates
Which of the following is a common environmental problem caused by detergents? (1) Acid rain, (2) Eutrophication, (3) Ozone depletion, (4) Global warming
Which of the following is a function of builders in detergents? (1) Increase hardness of water, (2) Soften water, (3) Add fragrance, (4) Increase toxicity
Fill in the blank: The ability of a surfactant to lower the surface tension of water is due to its __________ nature.
Fill in the blank: The environmental persistence of a detergent is largely determined by its __________.
Fill in the blank: The environmental risk of a detergent is reduced if it is __________ in water.
Fill in the blank: The hydrophilic head of an anionic surfactant typically contains a __________ group.
True or False: All surfactants are equally toxic to aquatic organisms.
True or False: Amphoteric surfactants can act as either acids or bases depending on the pH of the solution.
True or False: Anionic surfactants are the most commonly used surfactants in household detergents.
True or False: Nonionic surfactants do not carry any charge on their hydrophilic head.
