1. Which half-equation shows reduction?
Answer: A. Ag⁺ + e⁻ → Ag
Chemistry Class 10 FBISE Past Paper MCQs with Answers
57 MCQs from FBISE past papers, in their original option order, with the correct answer. Tap an option to check yourself.
Tap an option to check your answer.
Annual 2026, Set B (Paper code 2SA-I 26005 (B))
2. In sublimation, a substance changes directly from
Answer: D. Solid to gas
3. In an electrolytic cell, the anode is
Answer: B. Positively charged
4. Which physical parameter increases when an exothermic reaction occurs rapidly?
Answer: D. Temperature
5. Which of the following salts is soluble in water?
Answer: B. Sodium chloride
6. Which method is used to prepare a soluble salt from an acid and an alkali?
Answer: D. Titration
7. Which catalyst is used in the reaction 2SO₂ + O₂ ⇌ 2SO₃ + heat?
Answer: A. V₂O₅
8. On a rate of reaction graph, a steeper slope (or gradient) indicates
Answer: A. Faster reaction
9. When preparing a salt using an excess metal, the excess metal is removed by
Answer: C. Filtration
10. 1 dm³ =
Answer: C. 1000 cm³
11. C₂H₅OH + 2[O] → H₂O + ______ (KMnO₄/H₂SO₄)
Answer: C. CH₃COOH
12. Which fuel is commonly blended with petrol to reduce emissions?
Answer: B. Ethanol
Annual 2026, Set D (Paper code 2SA-I 26005 (D))
13. Which half-equation occurs at the anode during electrolysis of molten NaCl?
Answer: A. 2Cl⁻ → Cl₂ + 2e⁻
14. Change in state of a substance from gas to liquid is called
Answer: C. Condensation
15. The cathode in an electrolytic cell is always
Answer: C. Negatively charged
16. Rapid formation of gas during a reaction indicates
Answer: D. High reaction rate
17. Carbonates of ______ are usually soluble in water.
Answer: A. Na, K
18. Which technique is used to remove excess insoluble solid from salt solution?
Answer: D. Filtration
19. In the Contact process, SO₂ is converted into SO₃ at about
Answer: D. 450 °C
20. A graph of product concentration against time shows
Answer: D. Reaction rate
21. Salts are generally good conductors of electricity in ______ state.
Answer: C. Molten
22. Maximum amount of product in a reaction is determined by
Answer: A. Limiting reactant
23. Vinegar is produced by bacterial oxidation of
Answer: B. Ethanol
24. One major advantage of alcohol fuels over fossil fuels is that they
Answer: B. Are renewable
Annual 2026, Set M (Paper code 2SA-I 26005 (M))
25. Which half reaction will occur at cathode?
Answer: C. Ag⁺ + e⁻ → Ag
26. With the increase in temperature, the change of liquid into gas is called
Answer: C. Boiling
27. In an electrolytic cell, oxidation reaction occurs at
Answer: B. Anode
28. Which observation best indicates an increase in reaction rate?
Answer: A. Rapid rise in temperature
29. Which chloride is insoluble in water according to solubility rules?
Answer: D. Silver chloride
30. When an insoluble carbonate reacts with an acid, which gas is produced?
Answer: A. Carbon dioxide
31. The main purpose of using a catalyst in the Contact process is to lower
Answer: A. Activation energy
32. On a rate of reaction graph, zero slope (or gradient) indicates
Answer: D. Reaction has stopped
33. The most suitable method to prepare a soluble salt from an acid and an alkali is
Answer: D. Titration
34. Maximum amount of product in a reaction is determined by
Answer: C. Limiting reactant
35. Which condition is necessary for bacterial oxidation of ethanol to ethanoic acid?
Answer: D. Presence of oxygen
36. A disadvantage of alcohol fuels compared to petrol is
Answer: B. Lower energy content
Annual 2025
37. Bromine water test is used to indicate the presence of all EXCEPT
Answer: B. H₃C–CH₃
38. Which of the following is classified as an Arrhenius base?
Answer: C. NaOH
39. Which of the following is a straight chain hydrocarbon?
Answer: A. C₄H₁₀
40. Which of the following substances is a Bronsted-Lowry base?
Answer: C. NH₃
41. Which bonds are responsible for holding amino acids together in proteins?
Answer: C. Peptide bonds
42. Which pollutant is primarily responsible for acid rain?
Answer: D. SO₂
43. What type of impurity causes temporary hardness in water?
Answer: D. Ca(HCO₃)₂
44. Which process is used in the industrial manufacturing of sodium carbonate?
Answer: C. Solvay Process
45. Which of the following functional groups is present in carboxylic acids?
Answer: D. –COOH
46. Which condition favors the forward direction of an exothermic reaction?
Answer: B. Low temperature
47. Which solution turns blue litmus paper red?
Answer: B. Vinegar
48. Which compound will discharge pink color of KMnO₄ solution and will be oxidized?
Answer: B. Ethene
Annual 2023
49. Dark brownish viscous liquid (petroleum) is formed underground due to
Answer: C. Heat, pressure, bacterial effects and absence of air
50. The chemical method used to recognize chemical equilibrium state is called
Answer: D. Titration
51. Predict the unit of equilibrium constant (Kc) for 2ICl(g) ⇌ I₂(g) + Cl₂(g).
Answer: B. No units
52. Identify the Lewis base from the following:
Answer: B. Cl⁻
53. Urea contains ______ percentage of nitrogen.
Answer: B. 46
54. Water is used as an excellent cooler (coolant) in industries because of its
Answer: C. High heat capacity
55. ______ is a good source of protein.
Answer: B. Meat
56. The purpose of using a Hoffmann voltameter is
Answer: C. Electrolysis of acidified water
57. The chemical equation H₂O(l) ⇌ H⁺(aq) + OH⁻(aq) represents
Answer: D. Autoionization of water