How would you convert:

(a) ethanol into ethene?

(b) propanol into propanoic acid?

Name the process in each case and write the equations of the reactions involved.

26 Give the harmful effects of drinking alcohol. 26 Explain why, methanol is much more dangerous to drink than ethanol. 28 Give reasons for the following observations:

(a) Air holes of a gas burner have to be adjusted when the vessels being heated get blackened by the flame.

(b) Use of synthetic detergents causes pollution of water.

29 What would be observed on adding a 5% alkaline potassium permanganate solution drop by drop to some warm ethanol in a test-tube? Write the name of the compound formed during the chemical reaction. Also write chemical equation of the reaction which takes place.