2010
Burette readings (initial and final) must be given to two decimal places. Volume or pipete used must also be recorded but no account of experimental procedure is required. All calculations must be done in your answer boo…
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2010 WAEC SSCE Chemistry Past Questions
2010
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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2010
(a) An aqueous solution of salt Q was added to excess Sodium trioxocarbonate (V) solution in a test tube. There was effervescence, the test tube became warm and a white precipitate was observed. State three inferences th…
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2010
(a) Name one product of destructive distillation of coal that is (i) solid (ii) liquid; (iii) gas.(b) (i) What is the major component of synthetic gas? (ii) Give one reason why synthetic gas is not a major source of air…
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2010
(a (i) Explain why water is referred to as a universal solvent.(ii) Give one chemical test for water. H\(_2\)SO\(_4\)(b) A current of 1.25A was passed through an electrolytic cell containing dil. for 40 minutes.(i) Write…
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2010
(a)(i) Give the two reasons why soda lime is used instead of caustic soda in the preparation of methane.(ii) List two physical properties of methane.(iii) A hydrocarbon with a vapour density of 29 contains 82.76% carbon…
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2010
(a) (i) Define a base according to Arrhenius concept.(ii) Give one example of an Arrhenius base.(iii) Identify each of the following substances in aqueous solutions as strong electrolyte, non-electrolyte or weak electrol…
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2010
(a) (i) Define saturated solution.(ii) Tha solubility of KNO\(_3\) at 20°C was 3.00 mol dm\(^{-3}\) If 67.0g of KNO\(_3\) was added to 250 cm\(^{-3}\) of water and stirred at 20°C, determine whether the solution formed w…
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2010
(a) i) Give the name and nature of the radiations that are emitted during radioactivity.ii) State two differences between chemical reaction and nuclear reaction.iii) Balance the following nuclear reactions and identify…
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2010
The energy change which accompanies the addition of an electron to a gaseous atom is
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2010
Which of the following equations represents beta decay?
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2010
A solid substance with high melting and boiling points is likely to be a/an
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2010
Which of the following species correctly represented an ion of M with 13 protons and 10 electrons?
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2010
If X is a group lll element, its oxide would be represented as
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2010
Which of the following statements about chlorine and iodine at room temperature is correct?
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2010
Which of the following elements is a d-block element?
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2010
A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm3 of solution. Calculate the concentration of the solution. [Na2CO3 = 106.0]
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2010
Consider the neutralization reaction represented by the following equation: Na2CO3 + 2HNO 3 → 2NaNO3 + H2O + CO2 The stoichiometric ratio of acid to base is
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2010
The bonds in crystalline ammonium chloride are
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2010
Which of the following molecules has a triple bond in its structure?
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