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The diagram below shows a Bunsen burner when in use.
Date posted:
January 28, 2017
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What are the differences between luminous and no-luminous flames?
Date posted:
January 28, 2017
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Natural gas, coal and oil are known as fossil fuels. They are major sources of energy. Hydrogen gas is also a source of energy. State and explain two reasons why hydrogen is very attractive fuel compared to fossils.
Date posted:
January 16, 2017
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Define what a fuel is.
Date posted:
January 16, 2017
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What is molar heat of vaporization? Explain.
Date posted:
January 16, 2017
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Explain why graphite can be used as a lubricant while diamond cannot.
Date posted:
January 16, 2017
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Diamond and graphite are crystalline forms of cation. State two non crystalline (Amorphous) form of carbon.
Date posted:
January 16, 2017
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State observations made when excess hydrogen suphide gas is bubbled into copper (II) sulphate solution.
Date posted:
January 16, 2017
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A student attempted to prepare hydrogen sulphide gas and collected the gas over cold water. The student collected only a few bubbles of gas. Explain.
Date posted:
January 16, 2017
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Starting with zinc oxide, describe how a pure sample of zinc sulphate can be prepared in the laboratory.
Date posted:
January 16, 2017
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A form three student added sodium carbonate solution to a solution of aluminium chloride in water. A white precipitate was formed. The precipitate soon dissolved liberation a colourless gas.
i) What is the white precipitate?
ii) Explain why the precipitate dissolves?
Date posted:
January 16, 2017
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Magnesium and silicon are both in period III of the periodic table. The atomic radius of the magnesium is found to be higher than silicon. Explain this observation.
Date posted:
January 16, 2017
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Nitrogen (II) oxide is produced in the internal combustion engines. State and explain how it affects the environment.
Date posted:
January 16, 2017
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Name a pair of suitable reagents that can be used to prepare nitrogen (II) oxide in the laboratory.
Date posted:
January 16, 2017
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State Graham's law.
Date posted:
January 16, 2017
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Name the two flames produced by a Bunsen burner and the conditions under which they are produced.
Date posted:
January 16, 2017
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What factors should be considered when choosing a fuel for cooking?
Date posted:
January 14, 2017