2007
All your burette readings (initial and final) as well as the size size of your pipette, must be recorded but no account of experimental procedure is required. All calculations must be done in your answer book. A is a sol…
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2007 WAEC SSCE Chemistry Past Questions
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2007
Credit will be given for strict adherence to the instructions, for observations precisely recorded, and for accurate inferences. All tests, Observations, and inferences must be clearly entered in your answer book, in ink…
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2007
(a) State an indicator suitable for the titration of;(i) dilute HCl and NaOH\(_{3(aq)}\)(ii) dilute CH\(_3\)COOH and KOH\(_{(aq)}\)(iii) dilute HCl and NH\(_{3(aq)}\).Give a reason for your answer in each case.(b) Calcul…
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2007
(i) Draw and label an energy profile diagram of an endothermic reaction. Indicate on your diagram the I. activation energy II. heat change, \(\Delta\)H.(ii) Explain how the rate of reaction is affected by I. addition of…
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2007
i) What is the name of the process used for the industrial preparation of tetraoxosulphate (VI) acid?(ii) State the catalyst used in (a)(i)(iii) Show by means of bdanced chemical equations only, the industrial preparatio…
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2007
(a) Write an equation in each case to represent the (i) \(\beta\)-decay of \(^{24}_{11}Na\) to give Mg.ii) reaction of sodium with cold water.b)(i) State two differences between reaction (a)(i) and (ii)ii) State two appl…
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2007
(a)(i) What is 2 homologous series?(ii) Give two homologous series present in petroleum(iii) Give one example of a compound belonging to each of the homologous series in (a)(ii).(iv) Name two fractions obtained from the…
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2007
a) Define the following in term:. of electron transfer: (i) oxidation; (ii) reduction.(b)(i) Determina the oxidation stale of phosphorus in each of the following structures: I. POCI\(_3\) II. PH\(_3\).(ii) State with rea…
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2007
(a) Define the following terms:(i) Saturated solution; (ii) Solubility.(b) In an experiment to determine the solubility of a given salt Y, the following data were provided:Mass of dry empty dish = 7.16 gMass of dish + sa…
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2007
Which of the following properties is characteristic of the halogens?
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2007
Which of the following statements about rare gases are correct?
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2007
When a sodium atom forms the ion Na+,
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2007
If the difference between the electronegativities of two elements is large, the type of bond that can be formed between them is
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2007
Which of the following statements about sodium is not true?
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2007
Which of the following properties of atoms generally increases down a group in the periodic table?
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2007
A transition metal would be expected to
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2007
In which of the following atoms is the ionic radius larger than the atomic radius? [11 Na, 12Mg,13AI,17CI]
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2007
What is the IUPAC name of the compound represented by the molecular formula NaCIO4?
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2007
How many atoms are there in one mole of hydrogen gas? [Avogadro's constant = 6.02 x 1023mol-1]
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2007
14.8 g of a salt (z)dissolved in 250 cm3 of distilled water gives a concentration of 0.80 mol dm-3. Calculate the molar mass of the salt (z).
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