Question : Soap helps in better cleaning of clothes because:
Option 1: Soap acts like a catalyst
Option 2: It reduces the surface tension of the solution
Option 3: It gives strength to the solution
Option 4: It absorbs the dirt
Correct Answer: It reduces the surface tension of the solution
Solution : The correct option is It reduce the surface tension of the solution .
Soaps can dissolve the grease and oil that hold dirt in place, and they are efficient cleaners. They allow the solution to moisten objects more evenly by lowering its surface tension. The surfactants used in detergents increase water's capacity to moisten objects, cover surfaces, and penetrate the fibres of soiled clothing. The molecules of the surfactant aid water in grabbing hold of the grease, dissolving it and washing it away.
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Question : The surface tension of water on adding detergent to it:
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I. It gives the combinations between two goods that can be produced when the resources of the economy are fully utilised.
II. It illustrates the production possibilities
Question : Select the most appropriate option that can substitute the underlined segment in the following sentence. If there is no need to substitute it, select 'No substitution required'. I enjoy learn languages because I like them.
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