2022 NECO GCE Chemistry Practical Answers [28th November]
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NECO GCE 2022 FREE CHEMISTRY PRACTICALS (CHEM) QUESTION AND ANSWER ROOM 
 
Monday 28th November
Chemistry Paper I (Alternative to Practical)
2:00pm – 4:00pm

NECO GCE CHEMISTRY PRACTICAL ANSWERS 2022:

(1a)
The apapa part serves as a point where imported and exported goods come in or move out of Nigeria. It lies near the mouth of Lagos lagoon. The port handles the bulk of the country export and import. It is located on a very good habour and served by good roads and railway network located on latitude 6°N and longitude 3°E

(1b)
(i) River channels leading to it is narrow and can't contain large vessels
(ii) Poor port infrastructure
(iii) Problem of capital to develop the port
(iv) Seasonal fluctuation in port water

(1c)
(i) Cost of maintenance is small compared to sea port
(ii) Provides flexible service
(iii) Help to decongest traffic on larger seaport
(iv) Improves the commercial activities in the region

(1d)
(i) Through provision of employment to allow good means of livelihood
(ii) Using of earth observation system to monitor pipelines and hence prevent vandals
(iii) Government should engage stake holders particularly were communities were these pipelines passes
(iv) Development of communities infrastructure to avoid the feel of negligence
 



(2ai)
C is a soluble salt.

(2aii)
Ca²+ suspected.

(2aiii)
Ca2+ Present.

(2aiv)
Ppt remains insoluble.

(2av)
White Ppt formed which Remain insoluble

(2avi)
Brick red flame observed.

(2bi)
SO₂, H₂S Or CO₂ gas suspected

(2bii)
Lead(II) Ethanoate paper turns black

(2biii)
Gas is H₂S .
S²- present


(3ai)
I - KMnO4
II - Bromine water
III - Litmus paper

(3aii)
(i) A rotten egg odour is perceived
(ii) A colourless gas is formed
(iii) A green coloured compound is formed

(3bi)
I:
- A precipitate is formed
- Asoluble xompound is also formed

II:
- Filtration
- Decantation

(3bii)
AgNO3 (silver trioxonitrate(v)

 

 

2022 NECO GCE CHEMISTRY PRACTICAL QUESTIONS








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