How is soap made? Write a word equation involved in soap making.

39 Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer. 40 What is meant by a substitution reaction? Give an example (with equation) of the substitution reaction of an alkane. 41 How is ethanoic acid obtained from ethanol? Write down the chemical equation of the reaction involved. 41 How would you distinguish between ethanol and ethanoic acid by chemical test?