(i) Soapy detergent.
(ii) Sodium chloride
(iii) To solidify the cleansing agent hence separate it from the alcohol
(iv) Potassium hydroxide.
(v) - It is cheap
- Biodegradable
johnmulu answered the question on May 25, 2017 at 06:47
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(i) Name the reagents used in:
Step I.... Step II.. Step IV ...
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Give a reason for the answer.
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(b) Give a reason why the production of aluminium is not carried out using reduction process.
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(c) Name two uses of zinc metal.
Date posted: May 19, 2017. Answers (1)
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(ii) In which physical state is zinc at point Y in the furnace? Give a reason.
(iii) Suggest a value for the temperature at point X in the furnance. Give a reason
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(a) Name
(i) Substance C1
(ii) Process D1
(b) Give two reasons why aluminium is used extensively in the making of cooking pans.
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(ii) Explain why dilute hydrochloric acid cannot be used in step 1.
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(i) What material is anode made of? Give a reason
(ii) What precaution is taken to prevent chlorine and sodium from re-combining?
(iii) Give any two uses of sodium
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(b) Name one use of zinc other than galvanizing
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Name
(i) One of the substance in the slag.
(ii) Another iron ore material used in the blast furnance.
(iii) One gas which is recycled.
Date posted: May 16, 2017. Answers (1)
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(Solved)
Below is a simplified diagram of Downs cell used for the manufacture of sodium. Study it and answer the questions that follow.
(i) What material is the anode made of? give a reason
(ii) What precaution is taken to prevent chlorine and sodium from re-combining?
Date posted: May 16, 2017. Answers (1)
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(a) State the condition necessary for the reaction in step 2 to occur.
(b) Name: (i) Gas D (ii) One use of zinc
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(i) Identify:
Gas P
Reagent Q
Solid R
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Date posted: May 16, 2017. Answers (1)
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(i) Name the ore that is commonly used in this process.
(ii) Explain what takes place in the roasting furnace.
(iii) Identify gas P.
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(i) Name the reagent and state the condition for the reaction in step I.
(ii) Give the name of the following: (I). Solid S (II) Solid V (III) Solid T
(iii) Give reasons for the colour change in step 2.
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(ii) Why is the anode made of graphite and not steel?
(iii) State the properties of sodium metal that makes it possible for it to be collected as shown in the diagram.
iv) What is the function of the steel guaze cylinder?
v)Why is the anode made of graphite in this case instead of steel which is a better conductor of electricity?
vi)Give reasons why large quantities of electricity is required for this process
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