2008
Burette readings(initial and final) must be given to two decimal places. Volume of pipette user must also be recorded but on account of experimental procedure is required. All calculations must be done in your answer boo…
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2008 WAEC SSCE Chemistry Past Questions
2008
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 centered in your answer book, at th…
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2008
(a) In the laboratory preparation of crystals of CuSO\(_4\), a green powder Q was added to dilute H\(_2\)SO\(_4\), and stirred. Effervescence occurred and a gas R was given off which turned lime water milky. Excess Q was…
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2008
(a)(i) Define hard water(ii) Name two substances responsible for hardness in water(iii) Give two methods for the removal of hardness in water.(b)(i) What are the raw materials require for the manufacture of tetraoxosulp…
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2008
(a)(i) What are acidic oxides?(ii) Give one example of each of the following oxides: I. acidic oxide; II. basic oxide; III. amphoteric oxide; IV. neutral oxide(b)(i) Define each of the following terms; I. Heat II. Heat o…
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2008
(a)(1) Define covalent bond.(ii) Give two properties of covalent compounds(ii) With the aid of a diagram, show how ammonia molecule is formed(iv) Illustrate with a diagram the formation of ammonium ion?(v) What type of b…
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2008
(a) Consider the following reaction sequence.(i) What process leads/tathe formation of K?(ii) Write the formula of K.(iii) Write the structural formula of L and name L.(iv) Name A\(_n\)(v) Write the structure of M and na…
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2008
(a)(i) Define in terms of electron transfer I. oxidizing agent; II. reducing agent.(ii) Write a balanced equation to show that carbon in a reducing agent.(iii) State the change in oxidation number of the specie that reac…
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2008
(a) State (i) Pauli's Excusion principle;(ii) Hund's rule of maximum multiplicity.(b)(i) Write the electronic configuration of each of the following ions of copper: I. Cu\(_+\) II. Cu\(_{(2+)}\) [\(_{29}Cu\)](ii) Give t…
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2008
What is the atomic number of an element whose cation Y+ has the electronic configuration 1s22s22p6?
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2008
The valence electrons in a chloride ion are [17CI]
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2008
Find the number of neutrons in an atom represented by 4521X.
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2008
The mass spectrometer can be used to measure mass of
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2008
Arrange the following elements in order of increasing electron affinity: Br2CI2I 2F 2
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2008
Consider the following elements and their electronic configurationsW: 1s22s2X: 1s 22s22p6Y: 1s22s22p63s2Z: 1s22s22p63s23p2. Which of the elements belong to the same group in the periodic table?
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2008
Elements in the same group of the periodic table have
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2008
Which of the following statements is not true of halogens?
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2008
Atom 23488Q decay by alpha emission to give an atom R. The atomic number and mass number of atom R are respectively
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2008
Which of the following compounds with the corresponding masses contain the highest percentage of nitrogen? [N = 14]
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2008
What is the mass of 6.02 x 1024 atoms of magnesium? [Mg = 24, Avogadro constant = 6.02 x 1023 atoms mol-1]
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