Practise 39 real Federal Board questions on Fundamentals of Chemistry from 2023 to 2026. See the answer and explanation as soon as you answer.
Fundamentals of Chemistry is one of the 11 main chapters in our Federal Board Matric Chemistry question bank (9th class), and about 11% of its real questions come from it. Tayyari Karo has 39 real questions on this chapter from 2023 to 2026; 10 are multiple choice and marked instantly, and the rest are short and long questions with a model answer. By difficulty: 32 easy, 7 medium.
Work through the questions below, then open the explanation for each one. Redo the ones you missed a few days later.
These are real past-paper questions. Think of your answer first, then open the explanation.
Chemistry mainly deals with the study of:
Answer: B. Matter and its interactions
Chemistry is the science that studies the composition, properties and interactions (reactions) of matter.
Avogadro's constant represents the number of molecules in:
Answer: C. 44 g of CO₂
Molar mass of CO₂ = 44 g/mol, so 44 g = exactly 1 mole = Avogadro's number (6.022×10²³) of molecules.
Chemical composition of earth, rocks and minerals are studied in:
Answer: D. Geo Chemistry
Geochemistry is the branch of chemistry that studies the composition of earth, rocks and minerals.
Study of chemical changes that occur in living organisms is done in:
Answer: A. Biochemistry
Biochemistry is the branch of chemistry concerned with chemical processes occurring within living organisms.
Number of atoms in 2 moles of O₂ are:
Answer: C. 1.204 × 10²⁴
2 moles of O₂ contain 2 × Nₐ = 2 × 6.022×10²³ = 1.204×10²⁴ particles (using Avogadro's number).
58.5 gram of NaCl and 95 gram of MgCl₂ have equal number of:
Answer: C. Moles
Molar mass NaCl = 58.5 g/mol and MgCl₂ = 95 g/mol, so both samples are exactly 1 mole — equal number of moles.
Identify the branch of Chemistry involved in the given statements: (a) Large scale production of NH₃ by Haber's process (b) Breakdown of glucose gives energy to our body (c) Use of chlorofluorocarbons (CFCs) in refrigerator linked to depletion of ozone layer
(a) Large-scale production of NH₃ by Haber's process relates to Industrial Chemistry.
(b) Breakdown of glucose to release energy in the body relates to Biochemistry.
(c) Use of CFCs and their link to ozone depletion relates to Environmental Chemistry.
What are the sources of Nitrates and Phosphates found in water? Why are they considered harmful?
Sources: Agricultural runoff from fertilizers (containing nitrates and phosphates) applied to farmland, discharge of domestic/industrial sewage and detergents (phosphates in detergents), and animal waste.
Why harmful: Excess nitrates and phosphates in water cause eutrophication — they over-nourish algae and aquatic plants, causing excessive algal blooms. When these algae die and decompose, the process consumes dissolved oxygen in the water, leading to oxygen depletion and death of fish and other aquatic organisms.
| Session | Questions |
|---|---|
| 2026 Annual | 9 |
| 2025 1st Annual | 9 |
| 2025 2nd Annual | 11 |
| 2024 Annual | 6 |
| 2023 Annual | 4 |
39 real Federal Board (FBISE) Chemistry questions on Fundamentals of Chemistry from 2023 to 2026, for 9th class. Each one shows the session it came from.
No. We could not find an official FBISE marking scheme for these papers, so the answers and explanations are written by Tayyari Karo for practice. Check anything important with your teacher or textbook.
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