1999 JAMB UTME Chemistry Past Questions

1999

56.00cm3 of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas?[Molar volume of a gas at S.T.P = 22.4dm3]

1999

200cm3 each of 0.1M solutions of lead (II) trioxonitrate (V) and hydrochloric acid were mixed. Assuming that lead (II) chloride is completely insoluble, calculate the mass of lead (II) chloride that will be precipitated.…

1999

A gaseous metallic chloride MClx consists of 20.22% of M by mass. The formula of the chloride is [M = 27, Cl = 35.5]

1999

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)From the equation above, the mass of magnesium required to react with 250cm3 of 0.5M HCl is[Mg = 24]

1999

Which of the following will have its mass increased when heated in air?

1999

Which is the temperature of a given mass of a gas initially at 0°C and 9 atm, if the pressure is reduced to 3 atm at constant volume?

1999

Which of the following gases will diffuse fastest when passed through a porous plug?[H = 1, C = 12, N = 14, O = 16]

1999

1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s2An element with the electronic configuration above is a

1999

The method that can be used to convert hard water to soft water is

1999

Nitrogen obtained from the liquefaction of air has a higher density than that obtained from nitrogen containing compounds because the former contains

1999

In order to remove one electron from a 3S orbital of gaseous sodium atom, about 496KJMol-1 of energy is required. This energy is referred to as

1999

In which of the following are water molecules in the most disorderly arrangement?

1999

What is observed when aqueous solutions of each of tetraoxosulphate (VI) acid, potassium trioxoiodate (V) and potassium iodide are mixed together?

1999

The set of pollutants that is most likely to be produced when petrol is accidentally spilled on plastic materials and ignited is

1999

The correct order of increasing oxidation number of the transition metal ions for the compounds K2Cr2O7, V2O5 and KMnO4 is

1999

0.25 mole of hydrogen chloride was dissolved in distilled water and the volume made up of 0.50 dm3. If 15.0 cm3 of the solution requires 12.50 cm3 of aqueous sodium trioxocarbonate (IV) for neutralization, calculate the…

1999

Given that electronegativity increases across a period and decreases down a group in the periodic table, in which of the following compounds will the molecules be held together by the strongest hydrogen bond?

1999

N2O4(g) ↔ 2NO2(g). Increase in total pressure of the equilibrium reaction above will

1999

1999 JAMB UTME Chemistry Past Questions

56.00cm3 of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas?[Molar volume of a gas at S.T.P = 22.4dm3]

200cm3 each of 0.1M solutions of lead (II) trioxonitrate (V) and hydrochloric acid were mixed. Assuming that lead (II) chloride is completely insoluble, calculate the mass of lead (II) chloride that will be precipitated.…

A gaseous metallic chloride MClx consists of 20.22% of M by mass. The formula of the chloride is [M = 27, Cl = 35.5]

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)From the equation above, the mass of magnesium required to react with 250cm3 of 0.5M HCl is[Mg = 24]

Which of the following will have its mass increased when heated in air?

Which is the temperature of a given mass of a gas initially at 0°C and 9 atm, if the pressure is reduced to 3 atm at constant volume?

Which of the following gases will diffuse fastest when passed through a porous plug?[H = 1, C = 12, N = 14, O = 16]

1s2, 2s2, 2p6, 3s2, 3p6, 3d7, 4s2An element with the electronic configuration above is a

The method that can be used to convert hard water to soft water is

Nitrogen obtained from the liquefaction of air has a higher density than that obtained from nitrogen containing compounds because the former contains

In order to remove one electron from a 3S orbital of gaseous sodium atom, about 496KJMol-1 of energy is required. This energy is referred to as

In which of the following are water molecules in the most disorderly arrangement?

What is observed when aqueous solutions of each of tetraoxosulphate (VI) acid, potassium trioxoiodate (V) and potassium iodide are mixed together?

The set of pollutants that is most likely to be produced when petrol is accidentally spilled on plastic materials and ignited is

The correct order of increasing oxidation number of the transition metal ions for the compounds K2Cr2O7, V2O5 and KMnO4 is

0.25 mole of hydrogen chloride was dissolved in distilled water and the volume made up of 0.50 dm3. If 15.0 cm3 of the solution requires 12.50 cm3 of aqueous sodium trioxocarbonate (IV) for neutralization, calculate the…

Given that electronegativity increases across a period and decreases down a group in the periodic table, in which of the following compounds will the molecules be held together by the strongest hydrogen bond?

N2O4(g) ↔ 2NO2(g). Increase in total pressure of the equilibrium reaction above will

2SO2(g) + O2(g) ↔ 2SO3(g). In the chemical reaction above, the substance that will increase the rate of production of sulphur (VI) oxide is

The entropy and enthalpy of a system are a measure of