2011
Burette readings (initial and final) must be given to two decimal places. Volume of pipefte used must also be recored but no account of expeririental procedure is required. All calculations must be done in your answer bo…
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2011 WAEC SSCE Chemistry Past Questions
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2011
Credit will be given for strict adherence to the instructions, for observations precisely record and for accurate inferences. All tests, observations and inferences must be clearly entered in your answer book in ink, at…
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2011
(a) A colourless gas P was given off when dilute tetraoxosulphate (VI) acid was added to zinc salt Q. On bubbling the gas through lime water, a white precipitate R was formed. Identify P, Q and R.(b) Name a suitable appa…
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2011
(a)(i) Draw the energy profile diagram for the reaction; H\(_{2(g)}\) + I\(_{2(g)}\) \(\to\) 2Hl\(_{(g)}\); \(\Delta\)H = 13 KJ mol\(^{-1}\)(ii) If the concentration of HI\(_{(g)}\) increases from 0.000 to 0.002 mol dm\(…
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2011
(a) A compound X reacts with excess HNO\(_{3(aq)}\) to give carbon (IV) oxide and another compound Y. A solution of Y reacts with NaOH\(_{(aq)}\) to form a white precipitate which is insoluble in excess NaOH\(_{(aq)}\).…
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2011
(a)(i) What is a functional group?(ii) State the functional group in each of the following compounds: I. CH\(_3\)CH\(_2\)CH(CH\(_3\))OH; II. CH\(_3\)CH\(_2\)CH\(_2\)COOH.(b)(i) Complete the following equations:(ii) Draw…
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2011
(a)Define the term solubility.(b) The table below gives the solubility of salt Z at various mperatures Temperature (°C)0102030405060Solubility (mol dm\(^{-3}\))0.130.210.310.450.630.851.10(i) Plot a graph of solubility a…
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2011
The following table gives the atomic numbers of elements V, W, X, Y and Z.ElementVWXYZAtomic number1116181924 (a)Which of the elements: (i) belong(s) to group 1?(ii) is/are noble gas(es)?(iii) form(s) coloured compound(s…
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2011
(a)The table below gives the volume/pressure data for a particular sample of a gas-at a given temperature.Volumedm\(^3\) (V)4.002.001.00Pressure/atm (P)1.002.004.00(i) Deduce a mathematical relationship between volume (V…
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2011
Which of the following ions has the electron configuration 2,8,8?
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2011
What type of reaction is represented by the following equation?\(\frac{2}{1}\)D\(\frac{3}{1}\)H → \(\frac{4}{4}\)He + \(\frac{1}{0}\)n + energy
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2011
Which of the following electrons configurations correctly represents an inert element?
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2011
How many isotopes has hydrogen?
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2011
Which of the following hydrohalic acids is the weakest?
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2011
The energy change that accompanies the addition of an electron to an isolated gaseous atom is
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2011
Which of the following elements would produce coloured ions in aqueous solution?
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2011
Rare gases are stable because they
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2011
An element with the electron configuration of 1s 22s 22p 6 would have a combining power of
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2011
When element 20A combines with element 8Y,
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2011
The bond formed when two electrons that are shared between two atoms are donated by only one of the atoms is
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