JAMB · Nigeria · Predicted papers

JAMB Chemistry

1 paper40 marks27 min

What we predict comes up

From the syllabus weighting and how the papers are usually set. The papers below follow it.

Electrolysis, energy changes, rates and equilibrium17.5%Faraday's laws, enthalpy, collision theory and Le Chatelier's principle are the largest physical chemistry block, about 7 questions.
Separation, laws of chemical combination, kinetic theory and gas laws15%Separation methods, the combination laws, Graham's and Charles' laws and the mole at s.t.p. open the syllabus and usually give about 6 questions.
Atomic structure, the periodic table and chemical bonding15%Isotopes, electron configuration, periodic trends, bonding and molecular shape are tested every year, about 6 questions.
Non-metals, metals and chemistry in industry15%Industrial processes (Contact, Haber, blast furnace, aluminium, soap) and tests for gases give about 6 questions.

27 min · 40 marks · Calculator allowed

27:00

Answer all 40 questions. Each question carries 1 mark, and there is no penalty for a wrong answer.
The real UTME is one computer-based sitting of 180 questions in 2 hours across four subjects (60 in Use of English and 40 in each of the other three). The 27 minutes here is this subject's proportional share of that time.
Relative atomic masses and constants are given in the questions that need them. Molar volume of a gas at s.t.p. = 22.4 dm³; F = 96500 C/mol.
A basic calculator may be used.

Answer or mark a question and your score adds up here.

11 mark

Which method is most suitable for separating a mixture of ethanol (boiling point 78 °C) and water?

21 mark

Carbon forms two oxides, CO and

CO_{2}

. The masses of oxygen that combine with a fixed mass of carbon in the two oxides are in the ratio 1 : 2. This illustrates the law of

31 mark

Under the same conditions of temperature and pressure, how many times faster than oxygen does hydrogen diffuse? (H = 1, O = 16)

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