In order to enter her name in the Guinness Book of world records, Sangeeta started singing on Monday at 10.30 am. If the sings continuously for 36 hours then she will finish her singing on

A house wife wanted her house to be white washed. She bought 10 kg of quick lime from the market and dissolved in 30 litres of water. She noticed that water started boiling even when it was not being heated. Give reason for her observation. Write the corresponding equation and name the product formed.

Sita is a owner of confectionary. She got an order from one of her customers to prepare 150 loaves of bread for a birthday party. On her making process of bread, though there is a time constrain, she prepared the dough and kept it aside undisturbed for few hours. Later she made the required number of breads and delivered to customer on time. A day after the party, customer appreciated Sita for the soft and good quality of bread that she supplied to party. (a) Why Sita kept aside the dough undisturbed? (b) Name the living organism involved in the process. (c) What are the products of the process? (d) How this process enhances the quality of food?