1996 WAEC SSCE Chemistry Past Questions

1996

All your burette readings (initial and final), as well as the size of your pipette, must be recorded but no account of experimental procedure is required. All calculations must be done in your answer book.A is a solutio…

1996

Credit will be given for strict adherence to instructions, for observations precisely recorded, and for accurate inferences. All tests, observations, and inferences must be clearly entered in your answer book, in ink at…

1996

Mention one suitable laboratory procedure for(i) removing carbon (IV) oxide from a sample of air(ii) determining whether a given sample of water is pure or not;(iii) concentrating a dilute solution of sodium chloride.(b)…

1996

(a)(i) List three factors which affect the discharge of ions during electrolysis(ii) Describe in outline, the purification of copper by electrolysis.(b) the following data were collected in an experiment on electrolysis:…

1996

(a)(i) What is an acid?(ii) List three chemical properties of tetraoxosulphate (VI) acid(iii) Give two uses of tetraoxosulphate (VI) acid.(b)(i) Describe a suitable laboratory procedure for preparing a sample of zinc tet…

1996

(a)(i) Give one major use of alkenes.(ii) Name the simplest alkane that exhibits structural isomerism(iii) Determine the molar mass of an alkane that is represented as C\(_x\)F\(_{22}\). [H = 1, C = 12](iv) List two type…

1996

(a)(i) Explain what is meant by an effective collision(ii) What does each term represent in the following expression? \(\Delta G\) = \(\Delta H\) T\(\Delta\)S(iii) What deduction can be made about a system given that the…

1996

(a) Determine the oxidation number of manganese in MnO\(_4\)(b)(i) List two metals that are extracted from their ores by electrolysis(ii) Give one difference between a conductor and an electrolyte.

1996

(a) State the monomer units of (i) polyethene; (ii) cellulose(b) Name the two fuels obtained when steam and air are passed over red-hot coke.

1996

(a) Give the name of the:(i) process for obtaining ethanol from sugars;(ii) compound produced when ethanol undergoes bacterial oxidation.(iii) enzyme in yeast which catalyses the conversion of maltose to glucose.(b)(i) W…

1996

Use the following energy profile diagram to answer Questions (a) to (c) below.(a) From the diagram, determine the value of the; (i) enthalpy of the reaction (ii) activation energy of the reaction.(b) State whether the p…

1996

(a) (i)Name the class of oxides to which copper (II) oxide belongs.(ii) Give the reason why copper (II) oxide increases in mass on exposure to the atmosphere(iii) Write an equation to show the action of dilute hydrochlor…

1996

(a) The elements listed below to the same group in the Periodic Table \(_9F\) \(_{17}CI\) \(_{35}Br\) \(_{53}I\).(i) Write the electronic structure of the first member(ii) What is the family name of the elements.(iii) Wh…

1996

(a)(i) State two physical properties of hydrogen sulphide(ii) Name the laboratory equipment used for intermittent production of hydrogen sulphide(b) What property of hydrogen sulphide is illustrated in the reaction repre…

1996

(a) What is the anhydride of each of the following acids?:(i) H\(_2\)SO\(_4\)(ii) HNO\(_3\)(b) Classify each of the: following as normal salt/acid salt/basic salt/double salt(i) Sodium hydrogentrioxocarbonate (IV)(ii) Ir…

1996

(a) State three postulates of the kinetic theory(b) Name the process involved in the;(i) spread of the smell of a perfume across a room(ii) decrease in the yellow of a liquid after exposure in an open vessel.

1996

(a) List two gases which are monatomic(b) Mention one gas which forms:(i) dense white fumes with ammonia vapour(ii) yellow precipitate with ammoniacal silver trioxonitrate (V) solution.

1996

The following acids are monobasic except

1996

The existance of two or more forms of the same element in the same physical state is known as

1996

''Equal volumes of all gases at the same temperature and pressure contain the same number of molecules'' is an expression of

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