🔥 JAMB CHEMISTRY 2025: QUESTIONS & ANSWERS TO ACE YOUR EXAM! 🔥 *JOIN OUR TUTORIAL GROUP FOR MORE 1k only* 1. Atomic Structure and Periodicity Q1: Which of the following is an alkali metal? A) Magnesium B) Aluminum C) Potassium D) Chlorine Answer: C) Potassium Q2: The atomic number of an element is 17. How many electrons are in its outermost shell? A) 5 B) 6 C) 7 D) 8 Answer: C) 7 2. Chemical Bonding and Structure Q3: The type of bond present in NaCl is ____. A) Covalent B) Metallic C) Ionic D) Hydrogen Answer: C) Ionic Q4: The strongest type of intermolecular force in water is ____. A) Van der Waals forces B) Dipole-dipole interactions C) Hydrogen bonding D) Ionic bonding Answer: C) Hydrogen bonding *JOIN OUR TUTORIAL GROUP FOR MORE 1k only* 3. States of Matter and Gas Laws Q5: The volume of a gas is doubled while keeping temperature constant. What happens to the pressure? A) Doubles B) Remains constant C) Halves D) Increases four times Answer: C) Halves (Boyle’s Law: P₁V₁ = P₂V₂) Q6: A real gas behaves most like an ideal gas at ____. A) High pressure and low temperature B) Low pressure and high temperature C) High pressure and high temperature D) Low pressure and low temperature Answer: B) Low pressure and high temperature 4. Acids, Bases, and Salts Q7: Which of these is a strong acid? A) CH₃COOH B) H₂CO₃ C) HCl D) NH₃ Answer: C) HCl Q8: A base turns ____. A) Blue litmus red B) Red litmus blue C) Blue litmus white D) Red litmus green Answer: B) Red litmus blue 5. Electrolysis and Redox Reactions Q9: During the electrolysis of copper (II) sulfate solution using carbon electrodes, the product at the cathode is ____. A) Hydrogen gas B) Oxygen gas C) Copper metal D) Sulfur Answer: C) Copper metal Q10: In the reaction: Zn + CuSO₄ → ZnSO₄ + Cu The oxidizing agent is ____. A) Zinc B) Copper C) Sulfate ion D) Zinc sulfate Answer: B) Copper 6. Organic Chemistry Q11: The general formula of alkanes is ____. A) CₙH₂ₙ B) CₙH₂ₙ₊₂ C) CₙH₂ₙ₋₂ D) CₙH₂ₙ₊₁OH Answer: B) CₙH₂ₙ₊₂ Q12: The process used to separate crude oil into its components is called ____. A) Sublimation B) Distillation C) Chromatography D) Extraction Answer: B) Distillation 7. Rates of Reaction and Equilibrium Q13: Increasing temperature generally ____. A) Decreases reaction rate B) Increases reaction rate C) Stops the reaction D) Has no effect on reaction rate Answer: B) Increases reaction rate *JOIN OUR TUTORIAL GROUP FOR MORE 1k only* Q14: The effect of adding a catalyst to a reaction is ____. A) To increase activation energy B) To decrease activation energy C) To decrease the number of collisions D) To stop the reaction Answer: B) To decrease activation energy *JOIN OUR TUTORIAL GROUP FOR MORE 1k only* 08105727686