Practise General Science Class 9 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Study General Science Class 9 MCQs through multiple-choice questions in General Science. This subtopic contains 366 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these General Science Class 9 MCQs MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
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Answer: An atom of helium contains two electrons
Explanation The symbol ⁴₂He indicates helium has 2 protons (atomic number = 2) and mass number = 4 . In a neutral atom, the number of electrons = protons , so helium has 2 electrons. Last verified on 13-03-2026
بنسن برنر کو ______ نے مستحکم بنایا ہے؟
Answer: Increasing its length
Explanation A Bunsen burner is made more stable by increasing its base area , which lowers its center of gravity and makes it less likely to tip over. This is a common design principle in engineering , where a wider base provides greater stability.
بازی ایک _____ عمل ہے، جس کے لیے توانائی کے ان پٹ کی ضرورت نہیں ہوتی ہے۔
Answer: Passive
Explanation Diffusion is a passive process, meaning it does not require energy input. In diffusion, particles move from an area of higher concentration to an area of lower concentration until they are evenly distributed, without the use of energy.
خلیے کی موت جو ____ نامی بیرونی عنصر کی وجہ سے ہوتی ہے؟
Answer: Necrosis
Explanation Necrosis is a type of cell death caused by external factors such as injury , infection, toxins, or lack of blood supply. It is a premature and uncontrolled death of cells , often resulting in inflammation and tissue damage.
Answer: Dark reaction
Explanation The dark reaction , also known as the Calvin cycle. It is a light-independent reaction that occurs in the stroma of the chloroplast. This process uses the energy from ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into glucose.
مندرجہ ذیل میں سے کون سا آکسیڈائزنگ ایجنٹ ہے؟
Answer: Cl2
Explanation Chlorine (Cl2) is a strong oxidizing agent , which means it can accept electrons from other substances and cause them to be oxidized. Chlorine is a powerful oxidizer and is often used as a disinfectant or bleach.
ڈی بروگلی نے ______ میں الیکٹران میں لہر کے ذرہ دوہرے کو بڑھایا؟
Answer: 1923
Explanation De Broglie extended the wave- particle duality to electrons in 1923. He proposed that particles such as electrons exhibit wave-like properties. A hypothesis that was later confirmed experimentally and became a fundamental concept in quantum mechanics.
الیکٹران کے مشترکہ جوڑے کو اپنی طرف متوجہ کرنے کی صلاحیت کو ______ کہا جاتا ہے؟
Answer: Electronegativity
Explanation Electronegativity is the ability of an atom to attract a shared pair of electrons in a covalent bond. It measures the ability of an atom to pull electrons towards itself.
حیاتیاتی مسئلہ کا حل ______ سے شروع ہوتا ہے؟
Answer: Observation
Explanation Observation is the first step in the scientific method , which is used to solve biological problems. Scientists make observations about the natural world , notice patterns or phenomena, and ask questions about what they have observed. The correct order of the scientific method is: Observation Question Hypothesis Prediction Experimentation Data analysis Conclusion
سوکروز کی فلوئم ٹرانسپورٹ کو "ذریعہ سے ڈوبنے" کے طور پر بیان کیا جا سکتا ہے مندرجہ ذیل میں سے کون سا عام طور پر سنک کے طور پر کام نہیں کرے گا؟
Answer: Mature leaf
Explanation In the context of phloem transport , "source" refers to the location where sucrose is produced (usually leaves). While "sink" refers to the location where sucrose is consumed or stored (e.g., roots, stems, fruits, and storage organs). A mature leaf is typically a source , not a sink, as it produces sucrose through photosynthesis.
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