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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Biological Molecules
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.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Biological Molecules questions
Which of the following processes is done to make the soap transparent?
In the preparation of a soap, the fatty acid containing less than eight carbon atoms is not used, because the soap obtained:
Enzymes which bring about exchange of a functional group are called _.
The saturated solution of sodium chloride is added in the hot process of preparation of soap, because:
Which of the following statement is true?
Which of the following compounds cannot remove grease from the clothes?