2009
Burette readings (initial and final reading) must be given to two decimal places. Volume of pipette used must also be recorded but no account of experimental procedure is required. All calculations must be done in your a…
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2009 WAEC SSCE Chemistry Past Questions
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2009
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, a…
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2009
(a) List three pieces of apparatus required for the evaporation of sodium chloride solution to dryness.(b)(i) List two normal salts which when dissolved in water turn red litmus blue.(ii) State the phenomenon that is res…
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2009
(a) State Gay Lussac's Law.(b) Carbon (II) oxide reacted with oxygen to form carbon (IV) oxide in a see tube.(i) Write a balanced equation for the reaction.(ii) If 40 cm\(^3\) of the carbon (II) oxide were mixed with 30…
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2009
(a)(1) Define each of the following terms: I. deliquescence; II. efflorescence.(ii) Give one example I substance that undergoes each of the processes in (a)(i).(b) Outline how three colourless gases suspected to be etha…
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2009
(a) Atoms of four non-metallic elements in the same group of the periodic table are arranged in order of increasing atomic radius as R < T < W < X. Which of the elements(i) would readily lose electron(s) from th…
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2009
(a)(i) Define polymerization.(ii) Mention two types of polymerization.(iii) Give one example of I. naturally occurring polymer, II. synthetic polymer.(b)(i) Describe how ethyne could be prepared in the laboratory.(ii) Wr…
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2009
(a) (i) State Boyle's law.(ii) Give the mathematical expression of Boyle's law.(iii) Sketch the graphical representation of Boyle's law.(b) A given mass of gas occupied 500 cm3 at 30°C and 6.5 x 104 Nm\(^{-2}\). Calculat…
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2009
(a)(i) Outline a suitable procedure for the preparation of ZnCl\(_2\) crystals stating from zinc granules.(ii) Write a balanced equation for the reaction in (a)(i).(b) Considei' the following solutions: Na\(_2\)SO\(_{4(a…
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2009
How many orbitals are associated with the p-sub energy level?
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2009
Consider the reaction represented by the equation: 23892U + 10 → 13956Ba + 9436Kr + 310n. The reaction represents a
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2009
If 100 atoms of element X contains 70 atoms of 9X and 30 atoms of 11X, calculate the relative atomic mass of X
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2009
How many protons does 4020Ca contain?
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2009
Which of the following scientists discovered the neutron?
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2009
An element Q forms a compound QCI5. In which group of the periodic table is Q?
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2009
Which of the following electronic configurations correctly represents an element in period 3 of the periodic table?
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2009
Which of the following ions is isoelectronic with neon? [3Li, 3F, 10Ne, 17CI,19K]
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2009
The following properties are characteristics of transition elements except
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2009
Which of the following elements has the electronic configuration:1s22s22p63s23p1? [11Na, 13A1,14N,16S]
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2009
Which of the following molecules is not linear in shape?
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