1. There is a game among five friends during the leisure period. Prakash, one of the five friends, is the finder. He has to find the liar. Henry tells that orange has ascorbic acid. Kathir tells that soap solution is a base. Sharmila claims that vinegar is a neutral solution. Vignesh says that lime has a sour taste. Help Prakash to win the game. Who is the liar?
2. Prakash threw a shirt into the washing machine by accident. He kept a collection of blue and red litmus papers in his jacket. He took them outside after they had dried and was surprised. The litmus papers were all the same colour: blue. He became confused. Let him out of his muddle. What changed the colour of red to blue?