JAMB Chemistry 2004 Past Questions

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

A chemical reaction is always associated with

If a solution contains 4.9g of tetraoxosulphate (VI) acid, calculate the amount of copper (II) oxide that will react with it
[Cu = 64, O = 16, S = 32, H = 1]

What volume of gas is evolved at S.t.p if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid?
[Ca = 40, C = 12, O = 16, Cl = 35.5, H = 1 Molar volume of agas at s.t.p = 22.4 dm³

According to charles' law, the volume of a gas becomes zero at

It is difficult to achieve an orderly arrangement of the molecules of a gas because they

A given volume of methane diffuses in 20s. How long will it take the same volume of sulphur (IV) oxide to diffuse under the same conditions?
[C = 12, H = 1, S = 32, O = 16

An electron can be added to a halogen atom to form a halide ion with

The shape of s-orbitals is

²²⁶₈₈Ra → ^x₈₆Rn + α - particle
What is the value of x in the nuclear reaction above?

The property of chlorine which causes hydrogen chloride to be more ionic than the chlorine molecules is its

Chlorine consisting of two isotopes of mass number 35 and 37 in the ratio 3:1 has an atomic mass of 35.5. Calculate the relative abundance of the isotopes of mass number 37

Which of the following mixture of gases is likely to burn in flame

Hardness of water is caused by the presence of ions of

Pollution of underground water by metal ions is very likely in the soil that has high

A carcinogenic substance is

The solubility in mol dm/^-3 of 20g of CuSO₄ dissolved in 100g of water at 180^o is
[Cu = 64, S = 32, O =16]

Calcium tetraoxosulphate (VI) dissolves in water only sparingly to form a

Which of the following compound is a normal salt?

What volume of 0.5 mol dm^-3 H₂SO₄ will exactly neutralize 20cm³ of 0.1 mol dm^-3 NaOH solution?

The oxidation state of chlorine in HClO₄ is

ZnO_(s) + CO_(g) → Zn_(s) + CO_2(g)
In the reaction above, Zinc has been

Which of the following acts as both reducing and oxidized agent?

In the electrolysis of brine, the anode is

The mass of silver deposited when a current of 10a is passed through a solution of silver salt for 4830s is
[Ag = 108, F = 96500 c mol^-1]

2CO_(g) + O_2(g) → 2CO_2(g)
Given that ΔH[CO]is -110.4 kJmol^-1 and ΔH[CO₂] is -393.0 kJmol^-1, the energy change for the reaction above is

Which of the following hydrogen halides the highest entropy value?

N₂O_4(g) ↔ 2NO_2(g)
In the endothermic reaction above, more product formation will be favoured by

Which of the following shows little or no net reaction when the volume of the system is decreased?

The allotropy of carbon used in the decolourization of sugar is

Which of the following gases can be collected by the method of downward delivery?

When steam is passed over red-hot carbon, the substances produced are

Sulphur (IV) oxide bleaches by

Carbon is tetravalent because

Aluminium hydroxide is used in the dyeing industry as a

Alloys are best prepared by

Transition metals possess variable oxidation states because they have

Sodium metal is always kept under oil because it

Oxyacetylene flame is used for iron-welding because it

The alkyl group can be represented by the general formula

An isomer of C₅H₁₂ is

A characteristic of the alkane family is

Which of these reagents can confirm the presence of a triple bond?

Vulcanization involves the removal of

CH₃COOH_(g) → H_4(g) + CO_2(g)
The reaction above is

C₂H₅OH_(aq) → Y
If the above reaction takes place in conc. H₂SO₄ at 180^o, Y represents

Alkanol + Alkanoic ↔ Ester + Water
The reverse reaction above is known as

In the production of soap, concentrated sodium chloride solution is added to

In the experiment above, X is a mixture of nitrogen, carbon (IV) oxide and

The IUPAC nomenclature of the compound above is