What is the difference between molecules of soap is added to water? Will a micelle be formed in other solvents such as ethanol also? State briefly how the formation of micelles helps to clean the clothes having oily spots.

What are micelles? How is it formed when soap is added to water? Will a micelle be formed in other solvents such as ethanol also? State briefly how the formation of micelles helps to clean the clothes having oily spots.

Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?

What is the difference between soaps and detergements ? State in brief the cleaing action of soaps is removing an oily spot from a fabric. Why are soaps not very effective whene a fabric is washed in hard water ? How is this problem resolved ? .

(a) What do you understand by the term ''potential difference''? (b) What is meant by saying that the potential difference between two points is 1 volt? (c) What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other? (d) What is a voltmeter? How is a voltmeter connected in the circuit to measure the potential difference between two points. Explain with the help of a diagram. (e) State whether a voltmeter has a high resistance or a low resistance. Give reason for your answer.

(a) Name the reaction which is usually sued in the conversion of vegetable oils to fats. Explain the reaction involved in detail .Write a chemical equation to illustrate your answer (b) What is saponification? Write the chemical equation of the reaction involved in this process. Name all the substances which take part in this process and also those which are formed. (c ) Why does micelle formation take place when soap is added to water ? will a micelle be formed in other solvents like ethanol also?