A sample of air was collected on a day when the total atmosphere pressure was 795 mmHg. The sample contained only oxygen and nitrogen gas. If the nitrogen
in the sample had a pressure of 115 mmHg, how much pressure did the oxygen
have?
O 680 mm Hg
O 474 mmHg
O 913 mmHg
O 6.93 mmHg
O Other

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.