Which of the following constitutes highest percentage of Green House gases?
1). Ethane
2). Methane
3). Carbon Dioxide
4). Propane
1. An electric iron has a heating element made of:
4. Sulphur dioxide bleaches colouring matter by :
5. An example of replenshible energy source is
6. Ethanol containing 5%. water is known as
8. Which of the following is used to iodine common salt?