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:

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1. Physics

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

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2. Chemistry

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

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3. Biology

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

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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 – 10 | Chemistry | Chapter 12: Hydrocarbons

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: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q1When do homologous chromosomes separate and move to opposite poles in meiosis?

A. Anaphase I ✓ Correct Answer
B. Anaphase II
C. Metaphase I
D. Prophase I
💡 Explanation: During Anaphase I, homologous chromosomes are pulled apart to opposite poles; sister chromatids stay together until Anaphase II.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q2What is the primary mechanism of petroleum refining?

A. Radioactive enrichment of uranium
B. Industrial separation of crude oil into hydrocarbon fractions ✓ Correct Answer
C. Chemical synthesis of amino acids
D. Biological digestion of organic sludge
💡 Explanation: Petroleum refining uses fractional distillation and cracking to separate crude oil into useful hydrocarbon fractions like fuels.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q3Which process uniquely characterizes petroleum refining within hydrocarbons?

A. The biological digestion of organic sludge
B. The chemical synthesis of artificial amino acids
C. The radioactive enrichment of uranium isotopes
D. The industrial separation of crude oil into useful hydrocarbon fractions ✓ Correct Answer
💡 Explanation: Petroleum refining utilizes fractional distillation and cracking to separate crude oil into useful fuels and petrochemicals.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q4What is the primary definition of the cracking process in hydrocarbons?

A. Thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
B. Polymerization of small gaseous alkene monomers into solid plastics
C. Physical filtration of suspended particulate matter from liquid fuels
D. Neutralization of acidic petroleum distillates using strong alkalis
💡 Explanation: Cracking converts heavy, less valuable petroleum distillates into high-demand gasoline fractions.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q5What is the function of the cracking process in hydrocarbons?

A. Neutralizing acidic petroleum distillates
B. Breaking down heavy hydrocarbons into lighter fractions ✓ Correct Answer
C. Filtering suspended particulate matter from fuels
D. Polymerizing alkene monomers into solid plastics
💡 Explanation: Cracking breaks heavy, less valuable petroleum distillates into high-demand lighter fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q6What is the primary role of the cracking process in hydrocarbons?

A. Polymerizing small alkene monomers into plastics
B. Physically filtering suspended particulate matter from fuels
C. Breaking down heavy hydrocarbons into lighter fractions ✓ Correct Answer
D. Neutralizing acidic petroleum distillates using alkalis
💡 Explanation: Cracking breaks down heavy, less valuable petroleum distillates into lighter, high-demand fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q7What is the primary purpose of the cracking process in hydrocarbon chemistry?

A. Thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
B. Physical filtration of suspended particulate matter from liquid fuels
C. Neutralization of acidic petroleum distillates using strong alkalis
D. Polymerization of small gaseous alkene monomers into solid plastics
💡 Explanation: Cracking converts heavy, less valuable petroleum distillates into high-demand lighter fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q8What is the primary function of the cracking process in petroleum refining?

A. Thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
B. Polymerization of small alkene monomers into solid plastics
C. Neutralization of acidic petroleum distillates using strong alkalis
D. Physical filtration of suspended particulate matter from liquid fuels
💡 Explanation: Cracking converts heavy, less valuable petroleum distillates into high-demand lighter fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q9What is the primary function of the cracking process in hydrocarbon analysis?

A. Neutralizing acidic petroleum distillates
B. Polymerizing gaseous alkene monomers
C. Breaking down heavy hydrocarbons into lighter fractions ✓ Correct Answer
D. Filtering suspended particulate matter
💡 Explanation: Cracking breaks down heavy, less valuable petroleum distillates into lighter, high-demand fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q10Which mechanism describes the hydrocarbon cracking process?

A. Polymerization of gaseous alkenes
B. Filtration of suspended particulate matter
C. Neutralization of acidic distillates
D. Thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
💡 Explanation: Cracking breaks down heavy, less valuable petroleum distillates into lighter, high-demand fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q11Which process uniquely characterizes cracking in hydrocarbons?

A. Neutralizing acidic petroleum distillates with strong alkalis
B. Thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
C. Polymerizing small gaseous alkene monomers into solid plastics
D. Physical filtration of suspended particulates from liquid fuels
💡 Explanation: Cracking breaks down heavy, less valuable petroleum distillates into high-demand lighter fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q12What is the primary function of the hydrocarbon cracking process?

A. The thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
B. The neutralization of acidic petroleum distillates using strong alkalis
C. The polymerization of small gaseous alkene monomers into solid plastics
D. The physical filtration of suspended particulate matter from liquid fuels
💡 Explanation: Cracking converts heavy, less valuable petroleum distillates into high-demand lighter fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q13Which of the following best describes the hydrocarbon cracking process?

A. Polymerizing small alkene monomers into plastics
B. Thermal or catalytic breakdown of heavy hydrocarbons into lighter fractions ✓ Correct Answer
C. Physical filtration of suspended particles from liquid fuels
D. Neutralizing acidic petroleum distillates using alkalis
💡 Explanation: Cracking breaks down heavy, less valuable petroleum distillates into lighter, high-demand fractions like gasoline.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q14What defines addition polymerization?

A. Joining unsaturated monomers without byproducts ✓ Correct Answer
B. Thermal decomposition of polymer chains
C. Cross-linking of silicone polymers
D. Condensation of monomers with water elimination
💡 Explanation: Addition polymerization links alkene monomers together without losing any atoms or molecules.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q15How does addition polymerization function in organic chemistry?

A. Condensation of bifunctional monomers with water elimination
B. Joining of unsaturated monomers via double bond opening without byproducts ✓ Correct Answer
C. Thermal decomposition of polymer chains into simple gases
D. Cross-linking of silicone polymers using metallic catalyst bridges
💡 Explanation: Addition polymerization links alkene monomers together without losing any atoms or molecules.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q16Which statement describes addition polymerization?

A. Thermal decomposition of polymer chains into simple gases
B. Joining unsaturated monomers via double bond opening without byproducts ✓ Correct Answer
C. Cross-linking silicone polymers using metallic catalyst bridges
D. Condensation of bifunctional monomers with water elimination
💡 Explanation: Addition polymerization links alkene monomers together without losing any atoms or molecules.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q17What is the primary characteristic of addition polymerization?

A. Joining unsaturated monomers via double bond opening without byproducts ✓ Correct Answer
B. Cross-linking silicone polymers using metallic catalyst bridges
C. Condensing bifunctional monomers with the elimination of water
D. Thermal decomposition of massive polymer chains into simple gases
💡 Explanation: Addition polymerization links alkene monomers together through the opening of double bonds without losing any atoms or molecules.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Hard

Q18Which process defines addition polymerization in organic chemistry?

A. Thermal decomposition of polymer chains into simple gases
B. Condensation of bifunctional monomers with water elimination
C. Cross-linking of silicone polymers using metallic catalysts
D. Joining of unsaturated monomers via double bond opening without byproducts ✓ Correct Answer
💡 Explanation: Addition polymerization links unsaturated monomers, such as alkenes, together by opening their double bonds without the loss of any atoms or byproducts.
🏫 Class: 10 📘 Subject: Chemistry 🔖 Chapter: Hydrocarbons ⚙️ Level: Moderate

Q19What is the mechanism of addition polymerization?

A. Condensation of bifunctional monomers with water elimination
B. Cross-linking of silicone polymers using metallic catalysts
C. Thermal decomposition of polymer chains into simple gases
D. Joining of unsaturated monomers via double bond opening without byproducts ✓ Correct Answer
💡 Explanation: Addition polymerization links alkene monomers together through the opening of double bonds without the loss of any atoms or molecules.