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Questions and answers by
Maggie. K
Questions (28)
1)Give the two oxidation states of iron
2)Give the main chief ore of iron and give their formula 3)Name the impurities present in
1 answer
61 views
1)Write an equation showing how aluminium oxide dissolves in sodium hydroxide
2)Why is carbon(iv)oxide bubbled through the
1 answer
52 views
1)Give the half cell equation for the extraction of sodium chloride at the anode and cathode
2)What is the purpose of steel
1 answer
55 views
1)How can the melting point of the molten salt be lowered
2)Explain why sodium metal cannot be extracted by reduction methods
1 answer
81 views
Write an equation for the formation of brown precipitate
1 answer
35 views
What product do I get after reacting chlorine gas with iron
1 answer
25 views
What product do I get after reacting hydrochloric acid with potassium permanganate
1 answer
26 views
1)What is the role of the hot air blasts in the blast furnace
2)Why is it possible to separate the iron from slag 3)Write an
1 answer
69 views
What is the use of limestone and coke in the blast furnace used in extraction of iron
1 answer
35 views
1)Give two effects that the extraction of copper using copper pyrite could have on the environment
2)Give three uses of copper
1 answer
55 views
1)Suggest the other manufacturing plant that could be set-up near the zinc extraction plant.Give a reason for the answer.
2)Give
1 answer
33 views
In such an extraction sulphur dioxide may keep on escaping(leaking) to the atmosphere if care is not taken.Explain how this
1 answer
23 views
1)Explain why hard water flowing in lead pipes may be safer for drinking than soft water flowing in the same pipes.
2)State one
1 answer
49 views
Give two environmental hazards likely to be associated with extraction of lead
1 answer
35 views
Write the equation for the main reaction that takes place in the smelting furnice in the extraction of lead metal
1 answer
44 views
Name one other substance that can be used instead of sodium hydroxide during extraction of iron
1 answer
39 views
What is the equation between the reaction of iron(III)chloride and aqueous sodium hydroxide
1 answer
33 views
when iron chloride is reacted with hydrogen peroxide which yellow solution produced and why
1 answer
33 views
1)Explain why aluminium chloride fumes in damp air
2)Aluminium metal is a good conductor and is used for overhead cabled.State
1 answer
54 views
Although aluminium is higher than iron in the reactivity series,aluminium utensils do not corrode as easily as iron
1 answer
50 views
Why is it advisable to store sodium hydroxide solution in an aluminium container
1 answer
33 views
Why are sodium and fluoride ions not discharged during electrolysis of aluminium oxide
1 answer
37 views
Why are sodium and fluoride ions not discharged during electrolysis of aluminium oxide
1 answer
38 views
When bauxite is dissolved in excess sodium hydroxide which two residues are produced
1 answer
24 views
Why is bauxite dissolved in excess sodium hydroxide
1 answer
25 views
Which metal is extracted by thermal decomposition
1 answer
36 views
1)Why is it possible to extract sodium and aluminium by use of electrolysis method and not by radiation like in the case of
1 answer
47 views
1)Solve for x in the equation 2sin^2x-1=cos^2x+sin x for 0°<or=x<or=360°
2)An object A of area 10cm^2 is mapped onto its image
1 answer
23 views
