2023 WAEC BIOLOGY AND CHEMISTRY PRACTICAL SPECIMEN

2023 WAEC BIOLOGY  QUESTION & SPECIMENS SOLUTION

(1) Great care should be taken to ensure that the information given below does not reach the candidates either directly or indirectly before the examination.

(2) Each candidates should be instructed to bring to the examination room:
(a) Sharpened drawing pencils (preferably 2Bl at least 15cm long;
(b) An Eraser;
(c) A Ruler.

(3a) Each candidate should be provided with the following groups of specimens

Specimen A – Mature fresh eggs of catfish.
Specimen B – Fresh egg of domestic fowl (raw, with shell intact).
Specimen C – Picture/model/chart of uterus containing a foetus.
Specimen D – Longitudinal section of ovary of Pride of Barbados flower.
Specimen E – Leaf of Pride of Barbados.
Specimen F – Panicum plant/Guinea grass (whole plant).
Specimen G – Cocoyam plant/Caladium plant (whole plant).
Specimen H – Corm of cocoyam.
Specimen J – Dry humus in a beaker.
Specimen K – Moist humus in a beaker.
Specimen L – Ripe orange fruit (whole).
Specimen M – Longitudinal section of coconut fruit.
Specimen N – Longitudinal section of fresh chilli pepper fruit.

NB:
(i) All specimens can be provided as group specimens for five (5) to ten (10) candidates.
(ii) All specimens must carry individual labels (e.g. A, B, C, D, E, F, G, H, J, K, L, M, and N).

(3b) It is essential that each candidate should be provided with the following materials:
(i) hand lens/magnifying lens;
(ii) scalpel/razor blade /knife;
(iii) pair of forceps;
(iv) hand gloves;
(v) spatula;
(vi) Petri dish;
(vii) Fehling’s solutions A and B;
(viii) iodine solution.

(4) Report Forms are provided separately on which you are required to:
(a) supply the necessary information about the specimens;
(b) report on any difficulty in the conduct of examination;
(c) report any particular difficulty experienced by any candidate during the conduct of the examination, especially of the examiner would be unable to discover these from the scripts;
(d) carry out and record experimental observations as directed in the Report Form.

(5) You must enclose a completed Report Form in each envelope of scripts.

CHEMISTRY PRACTICAL 2023 SPECIMEN

1. Great care should be taken to ensure that the information given in the items 2 and 3 below does not reach the candidate either directly or indirectly before the examination.

2. In addition to the fittings and reagents normally found in a chemistry laboratory, the following apparatus and materials will be required by each candidate:

(a) One burette of 50 cm3 capacity;

(b) One pipette, either 20 cm3 or 25 cm3. (All candidates at one centre must use pipettes of the same volume. These should be clean and free from grease)

(c) The usual apparatus for titration;

(d) The usual apparatus and reagents for qualitative work including the following with all reagents appropriately labelled;

(i) Dilute sodium hydroxide solution;

(ii) Dilute hydrochloric acid;

(iii) Dilute trioxonitrate

(V) acid;

(iv) Silver trioxonitrate

(V) solution;

(v) Acidified potassium dichromate solution;

(vi) Aqueous ammonia;

(vii) Lime water;

(viii) Red and blue litmus paper

(ix) Dilute tetraoxosulphate (VI) acid;

(x) Fehlings solution A & B.

(e) Spatula;

(f) Filtration apparatus;

(g) One beaker

(h) One boiling tube;

(i) Four test tubes;

(j) Methyl orange as indicator;

(k) Glass rod;

(l) Wash bottle containing distilled/deionized water;

(m) Burning splint;

(n) Watch glass;

(o) Bunsen burner/source of heat;

(p) Droppers;

(q) Mathematical table/calculator.

3. Each candidate should be supplied with the following, where ‘n’ is the candidiate’s serial number

(a) 150 cm3 of a solution of HCl in a corked flask or bottle labelled ‘An’. These should all be the same containing 8.5 cm3 of concentrated HCl per dm3 of solution.

(b) 150 cm3 of Na2CO3.10 H2O in a corked flask or bottle labelled ‘Bn’. These should all be the same containing 5.0 g of the hydrated salt per dm3 of solution.

(c) One spatulaful of glucose in a specimen bottle labelled ‘Cn’. This must be the same for all candidates.

(d) One spatulaful of zinc oxide powder in a specimen bottle labelled ‘Dn’. This must be same for all candidate.