JAMB Chemistry 2006 Past Questions

The raw materials used for the smelting of iron ore in a furnace is

On heating, which of the following compounds will decompose to the free metal, nitrogen (IV) oxide and oxygen?

The group IA metals are not found free in nature because they

Carbon exist naturally in the combined state as

The efficiency of a solid catalyst to increase reaction rates depends on its

Dynamic equilibrium describes a situation where

The ion that will give a white precipitate with aqueous NaOH and soluble in excess of the base is

Which of the following pairs of substance will react further with oxygen to form a higher oxide?

The characteristic colour of the flame shown when a copper sail moistened with concentrated hydrochloric acid on a platinum wire is put on bunsen burner is

In the industrial production of H₂ from natural gas the CO₂ produced along with the H₂ is removed by

The sulphide which is insoluble in dilute hydrochloric acid is

Which of the following typically represents a photochemical reaction?

The gas obtained as a product of anaerobic action on organic matter buried in the earth is

Nigerian crude oil is described as light crude because of its

An example of aliphatic unsaturated hydrocarbon is

Which of the following has an isomer?

CH₃ - CH₂ - C CH
The hybridization in the compound above is

One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. The structure of the hydrocarbon is

An emulsion may be produced by shaking a detergent solution with

The products of the combustion of candle wax are

When 50cm² of a saturated solution of sugar of molar mass 342 g at 40^oC was evaporated to dryness, 34.2g of dry solid was obtained. The solubility of sugar at 40^oC is

Which of the following results in the fall of acid rain?

Water has the ability to dissolve almost all substance because its molecules has a structure with

When a crystal was added to the clear solution of its salt, the crystal did not dissolve and the solution remained unchange. This showed that the solution was

A particle that contains 11 protons, 12 neutrons and 10 electrons is probably a

A difference between chemical and physical change is that in a chemical change

The volume of 2.5 moles of oxygen at s.t.p is
[Molar volume of a gas at s.t.p = 22.4 dm³]

Nuclear fission involves the splitting of a heavy element into two nuclei of

What is the molar mass of a substance, if 0.4 mole of the substance has a mass of 25.0g?

The element with the electron configuration 1s²2s²2p³ is

A decrease in atomic size and an increase in nuclear charge across a period lead to

The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is

The idea of planetary electron was that of

If 30cm³ of gas at 50^oC is warmed to 80^o at a fixed pressure, the fractional increase in volume is

2C₂H_2(g) + 5O_2(g) → 4CO_2(g) + 2H₂O_(g)
In the reaction above, the mass of carbon(IV)oxide produced on burning 78 g of ethyne is
[C =12, O = 16, H = 1]

The ion that can be used as an oxidizing agent is

H_2(g) + Br_2(g) → 2HBr_(g)
The above reaction is carried out at 25^oC. ΔH is -72 kJ mol^-1 and ΔS is - 106 J mol^-1K^-1, the reaction will

Zinc and carbon rods are used as anode and cathode respectively in a

The solution that will conduct the highest amount of electricity is

In which of the following is the oxidation number of sulphur equal to -2?

In the electrolysis of CuSO_4(g) using platinum electrodes, the reaction at the anode is

Na₂CO_3(g) + 2HCl_(aq) → 2NaCl_(aq) + H₂O_(l) + CO_2(g)
How many moles of sodium trioxocarbonate (IV) are there in a 25 cm³ solution which required 10cm³ of 0.05 mol dm^-3 hydrochloric acid solution to neutralize it?

If the heat of combustion of hydrogen is -285.8kJ,
What is the heat of formation of water?

5SO_2(g) + 2KMnO_4(aq) + 2H₂O_(l) → K₂SO₄ + 2MnSO_4(aq) + 2H₂SO_4(aq)
In the reaction above, the products give a

In the diagram above, gas X is

In the diagram above, mixture Y is

The oxidation of the compound above produces

2-methylbut-2-ene has the structure

Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)?