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Neco Questions and Answers 2023
NECO Chemistry PRACTICAL SPECIMEN 2023
Chemistry PRACTICAL SPECIMEN
1. Great care should be taken to ensure that the information given below does not reach the candidates either directly or indirectly before examination.
2. In addition to the apparatus and reagents expected to be available in a Secondary School Chemistry Laboratory, each candidate will require the following:
(a) One burette (50 cm³)
(b) One pipette (20 cm or 25 cm³) However, all candidates in a centre must use pipettes of the same volume
(c) The usual apparatus for filtration.
(d) The usual apparatus and reagents for qualitative work including:
(i) Dilute sodium hydroxide solution
(ii) Dilute ammonia solution.
(iii) Dilute hydrochloric acid
(iv) Barium chloride solution
(v) Distilled water
(vi) Red and blue litmus paper
(vii) Phenolphthalein
(viii) Methyl orange
(ix) One boiling tube
(x) Five test tubes
(xi) Source of heat
(xii) Wash bottle containing distilled water
(xiii) Filtration apparatus
3. Each candidate should be supplied with the following:
(a) 150 cm of tetraoxosulphate (VI) acid solution in a corked flask or bottle labelled ‘A. These should all be the same containing 2.20 cm of concentrated tetraoxosulphate (VI) acid per dm of solution
(b) 150 cm of sodium trioxocarbonate (IV) solution in a corked flask or bottle labelled ‘B. These should all be the same containing 3.6 g of sodium trioxocarbonate(IV) pellets per dm of solution
(c) One spatulaful of NaCO, in a corked specimen bottle labelled C, Note: ‘n’ is the candidate’s serial number.
2023 NECO Chemistry Practical SPECIMENS
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