JAMB Chemistry 1992 Past Questions

There is a large temperature interval between the melting point and the boiling point of a metal because?

How many moles of (H+) are there in 1 dm³ of 0.5 M solution of H₂SO₄?

wH₂SO₄ + xAI(OH)₃ → yH₂O + = zAI₂(SO₄)₃. The respective values of w.x.y and z in the equation above are?

A given mass of gas occupies 2 dm³ at 300k. At what temperature will its volume be doubled keeping the pressure constant?

Which of the following is a measure of the average kinetic energy of the molecules of a substance?

If 100 cm³ of oxygen pass through a porous plug in 50 seconds, the time taken for the same volume of hydrogen to pass through the same porous plug is?



(O = 16, H = 1)

An increase in temperature causes an increase in pressure of a gas in a fixed volume due to an increase in the?

The nucleus of the isotope tritium, contains?

How many lone pairs of electron are there on the central atom of the H₂O molecules?

¹⁴₇N + X → ¹⁷₈O + ¹₁ H. In the above reaction, X is a?

The pollutants that are likely to be present in an industrial environment are?

Four elements P,Q,R and S have 1,2,3, and 7 electrons in their outermost shells respectively. The element which is unlikely to be a metal is?

Which of the following gases dissolves in water vapour to produce acid rain during rainfall?

Water for town supply is chlorinated to make it free from?

On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure

An emulsion paint consists of ?

A sample of orange juice is found to have a pH of 3.80. What is he concentration of the hydroxide ion in the juice?

Arrange HCI, CH₃COOH, C₆H₅CH₃ in order of increasing conductivity.

How many grams of H₂SO₄ are necessary for the preparation of 0.175 dm³ of M 6.00 M H₂SO₄?

(S = 32.06, O = 16.00 H = 1.00)

Copper (II) tetraoxosulphate (VI) solution is electrolyzed using carbon electrodes. Which of the following are produced at the anode and cathode respectively ?

Calculate the mass, in kilograms, of magnesium produced by the electrolysis of magnesium (II) chloride in a cell operating for 24 hours at 500 amperes.

S₂O^2-₃ + I₂ → S₂O₆^2- + 2I^-. In reaction above, the oxidizing agent is?

MnO₂ + 2CI^- + 4H⁺ → MnO²⁺ + CI₂ + 2H₂O.
The changes is oxidation numbers when the manganese, chloride and hydrogen ions react according to the above equation are respectively?

In which of the following is the entropy change positive?

In what way is equilibrium constant for the forward reaction related to that of the reversed reaction?

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

For a general equation of the nature xP + yQ ≈ mR + nS, the expression for the equilibrium constant is?

Which of these statements is TRUE about carbon (IV) oxide?

Which of the following combination of gases is used for metal welding? i. Oxygen and ethyne, ii. Hydrogen and ethyne, iii. Hydrogen and oxygen, iv. Ethyne, hydrogen and oxygen.

Which of the following oxides of nitrogen is unstable in air?

The gas formed when ammonium trioxonitrate (V) is heated with sodium hydroxide is?

The gas formed when ammonium trioxonitrate (V) is heated with sodium hydroxide is?

Safety matches contain sulphur and?

Addition of an aqueous solution of a salt gives a white precipitate. The salt is likely to be a?

Sodium hydroxide solution can be conveniently stored in a container made of?

Which of the following is NOT used as a raw material in the Solvay process?

Duralumin consists of aluminium, copper, ?

CaO_s + H₂O_(l) → Ca(OH)_2(s) ΔH -65 kj. The process represented by the above equation is known as?

The carbon atoms in ethene are?

Which of the following compounds reacts with sodium metal as well as silver and copper salts ?

Which of the following are isomers?

The functional group present in an organic compound which gives bubbles on treatment with a saturated solution of NaHCO₃ is?

An organic compound containing 40.1% carbon and 6.6% hydrogen has an empirical formula of?

The characteristics reaction of carbonyl compounds is?

Alkanals can be differentiated from alkanones by reaction with?

An example of a polysaccharides is?

In the experiment above. Z can be

Which of the following compounds is a secondary alkanol?

A given mass of gas occupies 2 dm² at 300k. At what temperature will its volume be doubled keeping the pressure constant?

Which of the following is a measure of the average kinetic energy of the molecules of a substance?