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JAMB UTME Chemistry Questions
Practise chemistry (science) for the Unified Tertiary Matriculation Examination: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Chemistry practice
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Q1.Which bond is formed by the sharing of electrons?
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Answer: C — Covalent
Covalent bonds share electron pairs.
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Q2.40 g of HCl (molar mass 36.5) is dissolved to make 1000 mL of solution. Find the molarity.
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Answer: A — 1.096 M
Moles = 40/36.5 = 1.096; molarity = moles ÷ litres = 1.096 ÷ 1 = 1.096 M.
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Q3.Avogadro’s number is approximately:
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Answer: C — 6.022 × 10²³
One mole contains 6.022 × 10²³ particles.
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Q4.36.5 g of glucose (molar mass 180) is dissolved to make 500 mL of solution. Find the molarity.
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Answer: B — 0.406 M
Moles = 36.5/180 = 0.203; molarity = moles ÷ litres = 0.203 ÷ 0.5 = 0.406 M.
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Q5.Rusting of iron requires:
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Answer: D — Both oxygen and water
Iron rusts in the presence of oxygen and moisture, forming hydrated iron(III) oxide.
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Q6.4 g of NaOH (molar mass 40) is dissolved to make 250 mL of solution. Find the molarity.
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Answer: A — 0.4 M
Moles = 4/40 = 0.1; molarity = moles ÷ litres = 0.1 ÷ 0.25 = 0.4 M.
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Q7.The process of converting a solid directly into a gas is called:
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Answer: B — Sublimation
Sublimation, e.g. dry ice or naphthalene.
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Q8.90 g of KCl (molar mass 74.5) is dissolved to make 2000 mL of solution. Find the molarity.
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Answer: D — 0.604 M
Moles = 90/74.5 = 1.208; molarity = moles ÷ litres = 1.208 ÷ 2 = 0.604 M.
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Q9.Which gas is produced when zinc reacts with dilute hydrochloric acid?
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Answer: C — Hydrogen
Zn + 2HCl → ZnCl₂ + H₂.
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Q10.What is the pH of a solution with [H⁺] = 10⁻³ mol/L?
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Answer: D — 3
pH = −log[H⁺] = −log(10⁻³) = 3.
How to approach chemistry questions
Moles = mass ÷ molar mass; molarity = moles ÷ litres. pH = −log[H⁺] and pH + pOH = 14 at 25 °C. For concepts, link each property to its position in the periodic table.
About JAMB UTME
Unified Tertiary Matriculation Examination — conducted by Joint Admissions and Matriculation Board (JAMB). Nigeria’s computer-based university admission exam; Use of English is compulsory.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
JAMB UTME practice topics
| Topic | Section | Question source |
|---|---|---|
| English Grammar | English | Question bank |
| Algebra | Mathematics | Calculated (new numbers every set) |
| Physics | Science | Calculated + question bank |
| Chemistry | Science | Calculated + question bank |
| Biology | Science | Question bank |