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1.(a) Define electrolysis
(b) During the electrolysis of molten aluminium oxide, write the equations at the;
Anode -
Cathode -
Date posted:
November 3, 2017
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Give any two differences between alpha and beta particles
Date posted:
November 3, 2017
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Describe how sodium sulphate crystals can be prepared starting with 50cm3
of 2M sodium hydroxide and 1M sulphuric
(VI) acid
Date posted:
November 3, 2017
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Explain why Aluminium is better conductor of electricity than magnesium
Date posted:
November 3, 2017
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Name one piece apparatus used to measure volume of gases
Date posted:
November 3, 2017
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Explain why solid Carbon (IV) oxide is preferred over ordinary ice for use by ice cream vendors
Date posted:
November 3, 2017
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Nitric acid is used to make ammonia nitrate. State two uses of ammonium nitrate
Date posted:
November 3, 2017
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(a) An electrolytic cell is set up a form two class to perform an electrolysis of brine using carbon chloride.
(i) What is brine?
(ii) Identify the cations in brine
Date posted:
November 3, 2017
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Explain how water hardness is removed by ion exchange method
Date posted:
November 3, 2017
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A piece of burning magnesium was lowered into a gas jar containing nitrogen oxide. State and explain the observations made
-Write an equation for the reaction above.
Date posted:
November 3, 2017
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State two uses of sodium carbonate
Date posted:
November 3, 2017
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A mixture of kerosene and water was shaken and left to stand, ammonia gas was then bubbled into the mixture followed by a few drops of phenolphthalein indicator. State and explain the observations made
Date posted:
November 3, 2017
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If chlorine gas is passed over heated iron fillings and the product dissolved in water, a yellow solution is formed.
(i) Identify the yellow solution.
(ii) What would be observed if aqueous sodium hydroxide solution was added to the yellow solution?
Date posted:
November 3, 2017
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Name the most suitable method you can use to separate;
(a) Xanthophyll and chlorophyll in green leaves.
(b) Oil from simsim seeds.
Date posted:
November 3, 2017
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Explain why the order of reactivity increases down group I elements but decreases down group (VII) elements.
Date posted:
November 3, 2017
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Name the ore from which copper is commonly extracted
Date posted:
November 3, 2017
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Briefly explain the following observations.
(i) Alkaline earth metals are generally less reactive than the alkali metals
Date posted:
November 3, 2017
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How does the use of manganese (IV) oxide in the laboratory preparation of chlorine gas differ from its use on the laboratory preparation of oxygen gas?
Date posted:
November 3, 2017
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What is meant by molar heat of formation?
Date posted:
November 3, 2017
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Describe how a pure sample of copper turnings can be obtained from mixture of copper turnings and zinc carbonate
Date posted:
November 3, 2017
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Name the process that takes place when:
(i) Fats or oils are hydrolyzed using an alkali
(ii) Sulphur is added to rubber in the manufacture of rubber tyres
Date posted:
November 3, 2017
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Give one physical test for water
Date posted:
October 30, 2017
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A form two topical question (Atoms,Chemical reactions and formula)
Date posted:
October 26, 2017
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Differentiate between electron affinity and ionization energy
Date posted:
October 26, 2017
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What are the processes involved in cooling of a substance from gaseous state to solid state?
Date posted:
October 26, 2017
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Highlight the main components of the following ions; (a)Ammonium ion (b)Hydronium ion.
Date posted:
October 26, 2017
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Why is it always advisable to scoop chemicals substance using a clean spatula?
Date posted:
October 25, 2017
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Explain why molten calcium chloride and magnesium chloride conduct electricity while carbon tetrachloride and silicon tetrachloride do not
Date posted:
October 25, 2017
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What is organic chemistry?
Date posted:
October 24, 2017
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What is a chemical formula?
Date posted:
October 21, 2017