Br2 QUESTION 9

Xe has an effusion rate of 0.00139 mol/sec. Which of the gases below would have an effusion rate of 0.00160 mollsec?

o C₂H2

O H2S

Ne

O COCI2

O CH3CI

QUESTION 10

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it's c (engineer's do their work with mechanical stuff not on any living being)

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.