1999 JAMB UTME Chemistry Past Questions

1999

The solubility product of Cu(IO3)2 is 1.08 * 10-7. Assuming that neither ions react appreciable with water to form H+ and OH-, what is the solubility of this salt?

1999

The solution with the lowest pH value is

1999

Which of the following statement is true of the electrochemical series?

1999

RS(aq) + HF(aq) → RF(s) + HS(aq)ΔH = -65.7 kj mol(-1). From the equation above, it can be deduced that

1999

When a current I was passed through an electrolyte solution for 40 minutes, a mass X g of a univalent metal was deposited at the cathode. What mass of the metal will be deposited when a current 2I is passed through the s…

1999

X + Y → Z. The rate equation for the chemical reaction above is ((-Δ[x])/Δt) = K[X]2[Y].The overall order of the reaction is

1999

What quantity of electricity will liberate 0.125 mole of oxygen molecules during the electrolysis of dilute sodium chloride solution?[ F = 96 5000 C mol-1 ]

1999

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

1999

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

1999

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

1999

Chlorine, bromine and iodine resemble one another in that they

1999

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

1999

The hydrocarbon that burns in air with a sooty flames is

1999

Which of the following metals is passive to concentrated trioxonitrate (V) acid?

1999

A metal that can be extracted from cassitertite is

1999

The pair of metals in the reactivity series that are usually extracted by the electrolysis of their ores is

1999

What properties of duralumin make it more useful than its constituent metals?

1999

An organic compound that does not undergo a reaction with both hydrogen cyanide and hydroxylamine can be

1999

POlyvinyl chloride is used to produce

1999

When excess ethanol is heated to 145oC in the presence of concentrated H2SO4, the product is

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