Tuesday, November 10, 2009

Science Test(Paper 2)

I guest it will had been in this paper.
a)P,Q and R are three conditions for combustion.Name them
1.P: oxygen

2.Q: fuel
3.R: heat
*paper*petrol*kerosene
*candle*wood*charcoal
b)Classify the substances above into two groups.
1.carbon:paper,wood,charcoal
2.Hydrocarbon:petrol,candle,kerosene

c)What is the difference in the produt of combustion between the carbon and hydrocarbon?
Carbon release carbon dioxide but hydrocarbon releases carbon dioxide and water.
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d)How will you test for the precence of gas produced from the process of combustion?
Use ime water.In the precence of carbon dioxide.
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