JAMB Chemistry 1995 Past Questions

Chromatography is used to separate components of mixtures which differ in their rates of?

Which of the following is a example of a chemical change?

The number of hydrogen ions in 4.9 g of tetraoxosulphate (IV) acid is?

(S = 32, O =16, H = 1, Na = 6.02 x 10₂₃

What volume of oxygen will remain after reacting 8cm³ of hydrogen with 20cm³ of oxygen?

A gas sample with an initial volume of 3.25 dm³ is heated and allowed to expand to 9.75 dm³ at constant pressure. What is the ratio of the final absolute temperature to the initial absolute temperature?

Two cylinders A and B each contains 30 cm³ of
oxygen and nitrogen respectively at the same temperature and pressure. If there are 5.0 moles of nitrogen, then the mass of oxygen is?

A liquid begins to boil when?

A particle that contains 8 proton, 9 neutrons and 7 electrons could be written as?

In the oil drop experiment, Millikan determined the?

The ability of ionic solids is generally due to the?

Which of the following statements is FALSE about isotopes of the same element?

Helium is often used in observation balloons because it is?

Deliquescent substances are also?

When plastics and packaging materials made from chloroethene are burnt in the open, the mixture of gases released into the atmosphere is most likely to contain?

The difference between colloides and and suspensions is brought out clearly by the fact that while colloids?

In general, an increase in temperature increases the solubility of a solute in water because?

Neutralization involves a reaction between H₃O⁺ and?

In the process of silver-plating a metal M, the metal M is the?

How many moles of copper would be deposited by passing 3F of electricity through a solution of copper (II) tetraoxosulpohate (IV)?

(F = 96 500 C mol^-)

2CL^-_(aq) → CI_2(g) + 2e^-(aq). The above half-cell reaction occuring at the anode during the electrolysis of dilute ZnCI₂ solution is?

Which of the following is a redox reaction?

Cr₂O₇^2-_(aq) + 14H⁺_(aq) + 6l^-_(aq) → 2Cr³⁺_(aq) + 3l_(g) + 7H₂O_(I).
The change in the oxidation number of oxygen in the equation above is?

If an equilibrium reaction has ∆H < O, the reaction will proceed favorably in the forward reaction at?

Which of the following processes leads to increase in entropy?

Which of the following equilibria is shifted to the right as a result of an increase in pressure?

In the industrial production of hydrogen from natural gas, carbon (IV) oxide produced along with the hydrogen is removed by?

Sulphur exists in six forms in the solid state. This property is known as?

A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?

Which of the following ions will give a white precipitate with aqueous NaOH and soluble in excess of the base?

In the extraction of iron in the blast furnace, limestone is used to?

Which of the following compounds will impart a brick-red colour to a non-luminious bunsen flame?

Group 1 A metals are not found free in nature because they?

CHCl₃ + Cl₂ → HCl + CCl₄. The reaction above is an example of?

Which of the following pairs has compounds that are isomers?

Aromatic and aliphatic hydrocarbons can be distinguished from each other by the?

The role of sodium chloride in the preparation of soap is to?

C_xH_Y + 4O₂ → 3CO₂ + 2H₂O. The hydrocarbon, C_xH_Y, in the reaction above is?

An example of a secondary amine is?

The relatively high boiling points of alkanols are due to?

USE THE SECTION OF THE PERIODIC TABLE ABOVE TO ANSWER THIS QUESTION.Which of the indicate an alkali metal and a noble gas respectively?

USE THE SECTION OF THE PERIODIC TABLE ABOVE TO ANSWER THIS QUESTION.Which letter represents a non-metal that is a solid at room temperature?

The arrangement above can be used for the collection of

Use the diagram above to answer this question. The activation energy of the uncatalysed reaction is

It can be deduced that the rate of the reaction

The option above shows the PH changes for the titration of a

The functional group represented in the compound above is