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Neco gce Further Mathematics Theory and Objective Answers (100%legit) CHEMISTRY PRACTICAL Essay verified Free (Expo) for National Examination Council. Neco gce CHEMISTRY PRACTICAL Questions For you to have good Neco result in CHEMISTRY PRACTICAL as well as repeated questions for free in this post.
Neco GCE 2022 FREE CHEMISTRY PRACTICAL QUESTION AND ANSWER ROOM
Neco Gce Further Mathematics OBJ
(2ai)
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)
H₂s gas Evolved. 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))
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