When ethanol is heated with concentrated sulphuric acid at 170 �C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as :

50 While cooking, if the bottom of the cooking utensil is getting blackened on the outside, it means that : 51 When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as : 53 When a vegetable oil is treated with hydrogen in the presence of nickel (or palladium) catalyst, it forms a fat. This is an example of: 54 The soap molecule has a: