1998 JAMB UTME Chemistry Past Questions

1998

The addition of water to calcium oxide leads to?

1998

30cm3 of hydrogen was collected over water at 27°C and 780 mm Hg. If the vapour pressure of water at the temperature of the experiment was 10 mm Hg, calculate the volume of the gas at 760 mm Hg and 7°C?

1998

C3H8(g) + 502(g) → 4H2O + 3CO2(g). Form the equation above the volume of oxygen at s.t.p. required to burn 50cm3 of propane is?

1998

8.0 g of an element X react with an excess of copper (ll) tetraoxosulphate (lV) solution to deposit 21.3 g of copper. The correct equation for the reaction is?(Cu = 64).

1998

A given amount of gas occupies 10.0 dm3 at atm, and 273°C. The number of moles of the gas present is?(Molar volume of a gas at s.t.p. = 22.4 dm3)

1998

A mixture of iron and sulphur can be separated by dissolving the mixture in?

1998

The property used in obtaining oxygen and nitrogen industrially from air is the?

1998

The line observed in the sample hydrogen spectrum are due to emission of?

1998

Which of the following electron configurations indicates an atom with the highest ionization energy?

1998

A solid begins to melt when?

1998

If sulphur (IV) oxide and methane are released simultaneously at the opposite ends of a narrow tube, the rates of diffusion Rso2 and Rch4 will be in the ratio? (S = 32, O = 16, C = 12, H = 1)

1998

90.0g of MgCI2 was placed in 50.0cm3 of water to give a saturated solubility of the salt is 8.0 mol dm3 at the same temperature, what is the mass of the salt left undissolved at the given temperature?(Mg = 24, Cl = 35.5)

1998

If an element X of an atomic number Z and mass number Y is irradiated by an intense concentration of neutrons, the relevant nuclear equation is?

1998

Excess phosphorus was burnt in a gas jar and the residual gas passed successively over concentrated KOH solution and concentration H2SO4 before being collected in a flask. The gases collected are?

1998

The soil around a battery manufacturing factory is likely to contain a high concentration of?

1998

Potassium tetraoxomanganate (VII) is often added to impure water to?

1998

2X(g) + Y(g) → Z(g): In the equation above, The rate of formation of Z is found to be independent of the concentration of Y and to quadruple when the concentration of X is doubled. The correct equation for the reaction i…

1998

2Cl2(g) + 2H2O(g) 4HCl(g) + O2(g)∆H° = +115KJ mol-1. In the above equilibrium reaction, a decrease in temperature will?

1998

Mg2+(aq) + 2e->(aq) → Mg(s)E°(volts) = 2.370Zn2+(aq) + 2e->(aq) → Zn(s)E°(volts) = -0.763Cds2+(aq) + 2e->(aq) → Cd(s)E°(volts) = 0.403Cu2+(aq) + 2e->(aq) → Cu(s)E°(volts) = 0.340In the electrochemical series…

1998 JAMB UTME Chemistry Past Questions

The addition of water to calcium oxide leads to?

30cm3 of hydrogen was collected over water at 27°C and 780 mm Hg. If the vapour pressure of water at the temperature of the experiment was 10 mm Hg, calculate the volume of the gas at 760 mm Hg and 7°C?

C3H8(g) + 502(g) → 4H2O + 3CO2(g). Form the equation above the volume of oxygen at s.t.p. required to burn 50cm3 of propane is?

8.0 g of an element X react with an excess of copper (ll) tetraoxosulphate (lV) solution to deposit 21.3 g of copper. The correct equation for the reaction is?(Cu = 64).

A given amount of gas occupies 10.0 dm3 at atm, and 273°C. The number of moles of the gas present is?(Molar volume of a gas at s.t.p. = 22.4 dm3)

A mixture of iron and sulphur can be separated by dissolving the mixture in?

The property used in obtaining oxygen and nitrogen industrially from air is the?

The line observed in the sample hydrogen spectrum are due to emission of?

Which of the following electron configurations indicates an atom with the highest ionization energy?

A solid begins to melt when?

If sulphur (IV) oxide and methane are released simultaneously at the opposite ends of a narrow tube, the rates of diffusion Rso2 and Rch4 will be in the ratio? (S = 32, O = 16, C = 12, H = 1)

90.0g of MgCI2 was placed in 50.0cm3 of water to give a saturated solubility of the salt is 8.0 mol dm3 at the same temperature, what is the mass of the salt left undissolved at the given temperature?(Mg = 24, Cl = 35.5)

If an element X of an atomic number Z and mass number Y is irradiated by an intense concentration of neutrons, the relevant nuclear equation is?

Excess phosphorus was burnt in a gas jar and the residual gas passed successively over concentrated KOH solution and concentration H2SO4 before being collected in a flask. The gases collected are?

The soil around a battery manufacturing factory is likely to contain a high concentration of?

Potassium tetraoxomanganate (VII) is often added to impure water to?

2X(g) + Y(g) → Z(g): In the equation above, The rate of formation of Z is found to be independent of the concentration of Y and to quadruple when the concentration of X is doubled. The correct equation for the reaction i…

2Cl2(g) + 2H2O(g) 4HCl(g) + O2(g)∆H° = +115KJ mol-1. In the above equilibrium reaction, a decrease in temperature will?

Mg2+(aq) + 2e-&gt;(aq) → Mg(s)E°(volts) = 2.370Zn2+(aq) + 2e-&gt;(aq) → Zn(s)E°(volts) = -0.763Cds2+(aq) + 2e-&gt;(aq) → Cd(s)E°(volts) = 0.403Cu2+(aq) + 2e-&gt;(aq) → Cu(s)E°(volts) = 0.340In the electrochemical series…

The pH of a solution obtained by mixing 100cm3 of a 0.2M solution of NaOH is?

Mg2+(aq) + 2e->(aq) → Mg(s)E°(volts) = 2.370Zn2+(aq) + 2e->(aq) → Zn(s)E°(volts) = -0.763Cds2+(aq) + 2e->(aq) → Cd(s)E°(volts) = 0.403Cu2+(aq) + 2e->(aq) → Cu(s)E°(volts) = 0.340In the electrochemical series…