2012
Which of the following electron configurations represents that of an atom in its ground state?
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2012 WAEC SSCE Chemistry Past Questions
2012
Burette readings (initial and final) 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 answer bo…
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2012
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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2012
(a) Explain briefly the observations in each of the following processes:(i) when carbon (IV) oxide is bubbled through lime water, It turns milky but the milkiness disappears when the gas is bubbled for a long time.(ii) A…
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2012
(a) Define each of the following terms: I. biotechnology; II. biogas.(ii) State two applications of biotechnology(b) (i) Describe briefly the production of ethanol from sugar cane juice.(ii) State the by-product of the…
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2012
(a) (i) Define standard electrode potential.(ii) State two factors that affect the value of standard electrode potential.(iii) Give two uses of the values of standard electrode potential.(iv) Draw and label a diagram fo…
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2012
(a) (i) What is a structural isomer?(ii) Write all the structural isomeric alkanols with the molecular formula C\(_4\)H\(_{10}\)O.(iii) Which of the isomers from (a)(ii) above does not react easily on heating with acidif…
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2012
(a) (i) Define nuclear fission.(ii) A certain natural decay series starts with \(^{238}_{92}U\) and ends with\(^{230}_{90}Th\). Each step involves the loss of an alpha or a beta particle. Using the given information, ded…
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2012
(a) (i) What is diffusion?(ii) State Charles' law:(iii) Sketch a graph to illustrate Charles' law.(iv) A given mass of a gas occupied 150 cm3 at 27 °C and a pressure of 1.013 x 105 Nm\(^{-2}\). Calculate the temperature…
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2012
(a) (i) What is the structure of the atom as proposed by Rutherford?(ii) Distinguish between the atomic number and the mass number of an element.(iii) Explain briefly why the relative atomic mass of chlorine is not a who…
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2012
Which of the following halogens is liquid at room temperature?
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2012
How many isomers has C 3H 6CI 2?
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2012
The number of orbitals in a p-sub level of an atom is
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2012
The d-block elements are paramagnetic because they
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2012
Two elements, X and Y are in the same group on the periodic table because they both have the same
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2012
The atomic radii of metals are usually
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2012
Which of the following ions has an electron configuration different from the other?
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2012
The complex compound formed by the combination of two elements with a large electronegativity difference is likely to be
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2012
The shape of a graphite crystal is
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2012
Which of the following elements is a metalloid?
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