JAMB Chemistry Past Questions, Answers & Explanations - Chemistry

Jamb Chemistry Questions

Question 6:

JAMB 1987

Which of the following gases can best be used for demonstrating the fountain experiment?
i) Nitrogen (ii) Ammonia (iii) Nitrogen (I) oxide
(iv) Hydrogen chloride.

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A Ii and iii
B I and iii
C Ii and iv
D Ii only

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Question 7:

JAMB 1987

When sodium hydroxide is heated with ammonium tetraoxosulphate (IV), the gas given off may be collected by?

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A Bubbling it through concentrated H₂SO₂
B Bubbling it through water and then passing it through calcium oxide
C Passing it directly through calcium oxide
D Passing it directly through calcium chloride

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Question 8:

JAMB 1987

Which of the following elements will form oxide which will dissolve both in dilute HNO₃ and NaOH solutions to form salts?

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A Al
B Mg
C Ag
D Mn

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Question 9:

JAMB 1987

Stainless steel is an alloy of?

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A Iron, carbon and silver
B Iron, carbon and lead
C Iron, carbon and chromium
D Iron and carbon only

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Question 10:

JAMB 1987

Alloys are best prepared by?

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A High temperature weilding of the metals
B Electrolysis using the major metallic component as cathode
C Reducing a mixture of the oxies of the elements
D Cooling a molten mixture of the necessary elements

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