Recent questions in Chemistry Form 3

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In a certain factory, iron is extracted from the haematite ore using the blast furnace as shown in Figure 1. The other raw materials are coke, limestone and air. The melting and boiling points of iron are 1535°C and 3000 °C, respectively.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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Some compounds such as CFCs and DDT are regarded as environmental pollutants. Give the complete names of

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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A factory uses 100 kg of ammonia each day to produce 160 kg of nitrogen(II) oxide. Calculate the percentage yield of nitrogen(II) oxide.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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In the laboratory, methane can be prepared from salts of alkanoic acids. Describe how methane is prepared from sodium ethanoate.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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The main component in natural gas is methane. Describe how methane in natural gas is formed.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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Incomplete combustion of pentane may result in air pollution. Write an equation to illustrate this combustion.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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Draw and name two isomers of pentane

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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Crude oil is a mixture of hydrocarbons which are separated by fractional distillation. One of the components obtained contains an alkane A, with eleven carbon atoms.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

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Nitrogen(IV) oxide is prepared by heating lead(ll) nitrate.

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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The Figure below shows a reaction scheme starting with copper turnings. Study it and answer the questions that follow

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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The table shows pH values of solutions of compounds D, E. F and G

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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Draw the structural formula of 2-methylbut-2-ene.

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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Carbon(II) oxide was passed over 4.1g of heated oxide of copper in a combustion tube until there was no further change. The mass of the final substance was found to be 3.29g

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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What is organic chemistry?

asked Jun 20, 2021 in Chemistry Form 3 by Paul

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