2019
All your burette readings (initials and final), as well as the size of your pipette, must be recorded but no account of experimental procedure is required. All calculations must be done in your answer booklet.(a) State w…
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2019 WAEC SSCE Chemistry Past Questions
2019
All your burette readings (initials and final) as well as the size of your pipette must be recorded but no account of experimental procedure is required. All calculations must be done in your answer booklet.C is a mixtur…
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2019
All your burette readings (initials and final) as well as the size of your pipette must be recorded but no account of experimental procedure is required. All calculations must be done in your answer booklet. A is a solut…
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2019
(a)(i) Draw and label a diagram to illustrate the preparation and collection of dry chlorine gas in the laboratory. (ii) State two uses of chlorine.(b) Describe the preparation of hydrogen from water gas.(i) Name the chi…
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2019
(a) The following reaction scheme is an illustration of the contact process. Study the scheme and answer the questions that follow.(i) Name X and Y(ii) Write a balanced chemical equation for each of the processes I, II,…
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2019
(a) In the Solvay process, explain briefly with equations the functions of the following substances:limestone;ammonia.(b) (i) Write a chemical equation for the fermentation of glucose.(ii) Explain briefly why a tightly-c…
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2019
(a) A hydrocarbon having the formula C\(_{10}\)H\(_{22}\) was cracked to produce C\(_6\)H\(_{14}\) and another hydrocarbon P.(i) Give the molecular formula of P.(ii) Draw the structures of two isomers of P. (ii) Give a r…
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2019
(a) State the conditions necessary for the cracking of long-chain hydrocarbons to produce more gasoline. (b) State two reasons why metallic objects are electroplated(c) (i) Explain briefly why calcium oxide cannot be use…
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2019
(a) (i) Write an equation for the reaction by which sulphur dioxide in solution could be converted to tetraoxosulphate (VI) acid. (ii) State one test to confirm the conversion of sulphur dioxide to tetraoxosulphate (VI)…
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2019
(a) (i) What is meant by hardness of water? (ii) Describe briefly how you would determine what proportion of hardness in a given sample of water is due to permanent hardness. (iii) Give two reasons why hardness of wate…
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2019
(a) (i) State the important points put forward in Dalton s atomic theory. (ii) How does the theory explain the law of multiple proportion?(b) (i) Name three commercially useful products that may be obtained by chemical…
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2019
(a) (i) Name three different methods for preparing salts. (ii) Give one example of a balanced equation for each of the methods named in (a)(i). (iii) State two uses of sodium trioxocarbonate (IV). (b) If you were given…
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2019
(a) Explain briefly why \(_2^4He\) has a stable electron configuration compared to \(_4^9Be\) (b) Consider the following elements: 1H and 3Li. (i) State the number of electrons that an atom of each element would have af…
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2019
Kipps apparatus can be used to prepare?
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2019
The group to which elements belong in the periodic table is determined by the number?
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2019
Which of the following methods is NOT used for the separation of mixtures?
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2019
The method used to collect gas in the laboratory depends on its?I. boiling point II. density III. smell IV. solubility in water
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2019
The number of electrons in the 3d orbital of \(_24\)Cr is
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2019
The atoms of\(^{64}_{29}\)Cu and \(^{65}_{30}\)Zn have the same number of?
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2019
One of the deductions from Rutherford's alpha particle scattering experiment is that?
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