When soap or detergent is added to water, the surface tension of water is:
Correct answer: B. Reduced by both
- A. Increased by both
- B. Reduced by both
- C. Reduced by detergent and increased by soap
- D. Reduced by soap and increased by detergent
Explanation
When soap and detergent are added to the water, the ionic part of soap and detergent attract grease and repel water molecules, thus the hydrogen bonds that hold the water molecules weaken therefore surface tension of water decreases.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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