Chemistry Past Questions

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The gas that will form a white precipitate with acidified silver trioxonitrate (v) is

A. NH₃
B. SO₂
C. CO₂
D. HCL

View Answer & Discuss (10) JAMB 1999

Chlorine, bromine and iodine resemble one another in that they?

A. dissolve in alkalis
B. react violently with hydorgen without heating
C. are liquids
D. displace one another from solutiions of their salts

View Answer & Discuss (26) JAMB 1999

The salt that reacts with dilute hydrochloric acid to produce a pungent smelling gas which decolourizes acidified purple potassium tetraoxomanganate (VII) solution is

A. Na₂SO₄
B. Na₂SO₃
C. Na₂S
D. Na₂CO₃

View Answer & Discuss (13) JAMB 1999

A pair of compounds that can be used to generate a gas which has physiological effect on human beings is

A. sodium trioxonitrate (V) and calcium chloride
B. sodium dioxonitrate (III) and ammonium chloride
C. sodium trioxonitrate (V) and ammonium chloride
D. sodium dioxonitrate (III) and potassium chloride

View Answer & Discuss (13) JAMB 1999

Hydrogen is used in oxy-hydrogen flames for melting metals because it

A. evolves a lot of heat when burnt
B. combines explosively with oxygen
C. is a very light gas
D. is a rocket fuel

View Answer & Discuss (5) JAMB 1999

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