Last Updated: September 2026 |
Target Audience: Class 9 & 10 Students |
Curriculum Mapping: Federal Board (FBISE) & Punjab Boards |
Subjects : Mathematics, Physics, Chemistry, Biology |

Academic Science Quiz Portal

Comprehensive Practice for Class 9 and 10 Science Syllabi

Welcome to the Academic Science Quiz hub of sscquizhub.com. Designed specifically for Class 9 and Class 10 students, our platform features an extensive repository of multiple-choice questions mapped directly to the curricula of the Federal Board (FBISE) and Punjab Boards.

Whether you are preparing for board exams or competitive assessments, our database covers core subjects including Physics, Chemistry, Biology, and General Science. Each question is accompanied by detailed explanations to reinforce conceptual clarity and objective-testing strategies.

Available Subject Modules & Coverage

  • Physics (Class 9 & 10): Covers Kinematics, Dynamics, Work & Energy, Waves, Geometrical Optics, Electrostatics, and Current Electricity.
  • Chemistry (Class 9 & 10): Covers Atomic Structure, Periodic Table, Chemical Bonding, Solutions, Electrochemistry, and Acids/Bases.
  • Biology (Class 9 & 10): Covers Cell Biology, Bioenergetics, Nutrition, Gas Exchange, Homeostasis, and Genetics.
  • General Science: Foundation modules focusing on integrated scientific principles and everyday science.

🔍 Question Validation & Quality Assurance: To ensure high academic accuracy, our question bank goes through a rigorous multi-tier validation pipeline. Questions are initially processed using advanced AI modules to check logical consistency, followed by verification against standard curriculum textbooks and authoritative online resources via Google. Detailed explanations are made available to help students learn from each attempt.

💡 Study Tip: For optimal retention, use these quizzes in tandem with your textbook chapters. Read the relevant chapter, complete a targeted test, and review the explanations for any missed questions.

Choose a subject below to begin your practice:

⚡

1. Physics

Master kinematics, dynamics, work and energy, thermodynamics, and electromagnetism.

🧪

2. Chemistry

Test your grasp on organic, inorganic, and physical chemistry to ensure no topic is left unprepared.

🧬

3. Biology

Evaluate your knowledge of the entire living world, from cell biology to human physiology.

🌍

4. General Science

Challenge yourself with complete problem sets covering foundational science concepts.

⚙️ INTERACTIVE QUIZ SETUP

📂 Available Academic Question Bank Coverage

Our academic database is structured by grade level and textbook chapters to support board exam preparation and conceptual mastery:

Class 10 Biology: 7 Chapters (342+ MCQs)
Class 10 Chemistry: 5 Chapters (209+ MCQs)
Class 10 Mathematics: 12 Chapters (1014+ MCQs)
Class 10 Physics: 7 Chapters (509+ MCQs)
Class 11 Mathematics: 9 Chapters (2727+ MCQs)
Class 11 Physics: 11 Chapters (1983+ MCQs)
Class 9 Biology: 13 Chapters (1009+ MCQs)
Class 9 Chemistry: 14 Chapters (1141+ MCQs)
Class 9 Mathematics: 16 Chapters (1004+ MCQs)
Class 9 Physics: 9 Chapters (722+ MCQs)
Class General General: 1 Chapters (199+ MCQs)

📚 Solved Academic MCQs & Concept Explanations – 9 | Chemistry | Structure of Atoms

Study these curriculum-aligned objective questions with verified answers and step-by-step explanations below, or use the interactive quiz configurator above to launch a customized test.

🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q1Why is water’s bond angle (104.5°) smaller than the tetrahedral angle (109.5°)?

A. The repulsion from two lone pairs compresses the angle between the bond pairs ✓ Correct Answer
B. The high electronegativity of oxygen expands the angle
C. The small size of hydrogen atoms pulls the bonds closer
D. Bond‑pair repulsion pushes the lone pairs apart
💡 Explanation: Lone‑pair–lone‑pair repulsion is stronger than bond‑pair repulsion, pulling the H‑O‑H angle down to 104.5°.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q2What is the molarity of a solution with 40 moles of solute in 5 L?

A. 45 M
B. 10 M
C. 200 M
D. 8 M ✓ Correct Answer
💡 Explanation: Molarity = Moles / Volume. 40 moles / 5 L = 8 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q3What is the molarity of a solution with 54 moles of solute in 6 L?

A. 9 M ✓ Correct Answer
B. 324 M
C. 60 M
D. 11 M
💡 Explanation: Molarity = Moles / Volume. 54 moles / 6 L = 9 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q4What is the molarity of a solution with 70 moles of solute in 7 L?

A. 12 M
B. 10 M
C. 490 M
D. 77 M
💡 Explanation: Molarity = Moles / Volume. 70 moles / 7 L = 10 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q5What is the molarity of a solution with 88 moles of solute in 8 L?

A. 704 M
B. 13 M
C. 11 M ✓ Correct Answer
D. 96 M
💡 Explanation: Molarity = Moles / Volume = 88 / 8 = 11 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q6What is the molarity of a solution with 108 moles of solute in 9 L?

A. 14 M
B. 972 M
C. 117 M
D. 12 M ✓ Correct Answer
💡 Explanation: Molarity = Moles / Volume = 108 / 9 = 12 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q7What is the molarity of a solution with 130 moles of solute in 10 L?

A. 13 M ✓ Correct Answer
B. 140 M
C. 1300 M
D. 15 M
💡 Explanation: Molarity = Moles / Volume = 130 / 10 = 13 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q8What is the molarity of a solution with 154 moles of solute in 11 L?

A. 14 M ✓ Correct Answer
B. 16 M
C. 165 M
D. 1694 M
💡 Explanation: Molarity = Moles / Volume. 154 / 11 = 14 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q9What is the molarity of a solution with 180 moles of solute in 12 L?

A. 15 M ✓ Correct Answer
B. 17 M
C. 2160 M
D. 192 M
💡 Explanation: Molarity = Moles / Volume = 180 / 12 = 15 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q10What is the molarity of a solution with 208 moles of solute in 13 L?

A. 16 M ✓ Correct Answer
B. 221 M
C. 2704 M
D. 18 M
💡 Explanation: Molarity = Moles / Volume. 208 / 13 = 16 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q11What is the molarity of a solution with 238 moles of solute in 14 L?

A. 252 M
B. 19 M
C. 3332 M
D. 17 M ✓ Correct Answer
💡 Explanation: Molarity = Moles / Volume. 238 / 14 = 17 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q12What is the molarity of a solution with 270 moles of solute in 15 L?

A. 20 M
B. 18 M
C. 4050 M
D. 285 M
💡 Explanation: Molarity = Moles / Volume. 270 moles / 15 L = 18 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q13Calculate the molarity of a solution with 304 moles of solute in 16 L.

A. 320 M
B. 4864 M
C. 21 M
D. 19 M ✓ Correct Answer
💡 Explanation: Molarity = Moles / Volume. 304 / 16 = 19 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q14What is the molarity of a solution with 340 moles of solute in 17 L?

A. 20 M ✓ Correct Answer
B. 22 M
C. 5780 M
D. 357 M
💡 Explanation: Molarity = Moles / Volume. 340 / 17 = 20 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q15What is the molarity of a solution with 378 moles of solute in 18 L?

A. 21 M ✓ Correct Answer
B. 6804 M
C. 396 M
D. 23 M
💡 Explanation: Molarity = Moles / Volume. 378 / 18 = 21 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q16What is the molarity of a solution with 418 moles of solute in 19 L?

A. 22 M ✓ Correct Answer
B. 24 M
C. 437 M
D. 7942 M
💡 Explanation: Molarity = Moles / Volume. 418 / 19 = 22 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q17What is the molarity of a solution with 460 moles of solute in 20 L?

A. 9200 M
B. 480 M
C. 25 M
D. 23 M ✓ Correct Answer
💡 Explanation: Molarity = Moles / Volume. 460 moles / 20 L = 23 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q18What is the molarity of a solution with 504 moles of solute in 21 L?

A. 24 M ✓ Correct Answer
B. 10584 M
C. 525 M
D. 26 M
💡 Explanation: Molarity = Moles / Volume = 504 / 21 = 24 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q19What is the molarity of a solution with 550 moles of solute in 22 L?

A. 572 M
B. 25 M ✓ Correct Answer
C. 27 M
D. 12100 M
💡 Explanation: Molarity = Moles / Volume. 550 / 22 = 25 M.
🏫 Class: 9 📘 Subject: Chemistry 🔖 Chapter: Structure of Atoms ⚙️ Level: Moderate

Q20What is the molarity of a solution with 598 moles of solute in 23 L?

A. 621 M
B. 28 M
C. 13754 M
D. 26 M ✓ Correct Answer
💡 Explanation: Molarity = Moles / Volume. 598 / 23 = 26 M.