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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خامروں کی سرگرمی کو ____ سے بڑھایا جا سکتا ہے؟
Answer: Activator
Explanation Activators are molecules that increase the activity of enzymes , often by binding to a specific site on the enzyme. Inhibitors are molecules that decrease the activity of enzymes , often by binding to a specific site on the enzyme.
مندرجہ ذیل میں سے کون سا وٹامن اس کے استعمال سے صحیح طور پر منسلک ہے؟
Answer: Vitamin A → Incorporated into the visual pigment of the eye
Explanation Vitamin A is essential for the production of rhodopsin, the visual pigment in the retina that allows us to see in low light conditions.
کیریئر پروٹین کے ذریعے مخصوص مادوں کی خاص قسم کی حرکت _____ ہے؟
Answer: Facilitated diffusion
Explanation Facilitated diffusion is a type of passive transport that uses carrier proteins to move specific substances across the cell membrane without energy input. This process allows cells to regulate the movement of essential molecules, like sugars and amino acids, into or out of the cell.
سیلولر سانس لینے کے عمل میں 180 اے ٹی پی مالیکیولز تیار ہوتے ہیں، اس عمل کے دوران گلوکوز کے کتنے مول استعمال ہوتے ہیں؟
Answer: 5
Explanation In cellular respiration, each mole of glucose typically produces about 36-38 ATP molecules. To determine how many moles of glucose are consumed to produce 180 ATP molecules, we can use the following calculation: 180 ATP/36 ATP or mole of glucose = 5 moles of glucose Thus, 5 moles of glucose are consumed to produce 180 ATP molecules.
ٹھوس کو اس کا درجہ حرارت تبدیل کیے بغیر مائع میں تبدیل کرنے کے لیے حرارتی توانائی کی منتقلی کو ____ کہتے ہیں؟
Answer: Latent heat of Fusion
Explanation Latent heat of fusion is the energy required to change a solid into a liquid (or vice versa) without changing its temperature. Latent heat of vaporization is the energy required to change a liquid into a gas (or vice versa) without changing its temperature.
دو فلورین ایٹم ______ کی الیکٹرانک ترتیب کو حاصل کرنے کے لیے اپنے سب سے بیرونی خول میں ایک ایک الیکٹران کا اشتراک کرتے ہیں؟
Answer: Ne
Explanation Fluorine (F) has an atomic number of 9 and an electronic configuration of 1s² 2s² 2p⁵. To achieve a stable electronic configuration , two fluorine atoms share one electron each to form a covalent bond. Resulting in a configuration similar to that of neon (Ne), which is 1s² 2s² 2p⁶.
جب سیر شدہ محلول کو پتلا کیا جاتا ہے، تو یہ ____ میں بدل جاتا ہے؟
Answer: Unsaturated solution
Explanation When a saturated solution is diluted, the concentration of the solute decreases, and the solution becomes unsaturated. This means that the solution can still dissolve more solute than it currently contains.
جیسے جیسے درجہ حرارت بڑھتا ہے، ابتدائی طور پر رد عمل کی شرح _____ ہوگی؟
Answer: Increase
Explanation As temperature increases , the rate of reaction initially increases due to the increased kinetic energy of the molecules. It allowing them to overcome the activation energy barrier and react more quickly.
مقداری مشاہدہ _____ کا استعمال ہے؟
Answer: Equipment
Explanation Quantitative observation involves the use of instruments, tools, or equipment to measure and collect numerical data about the world. This approach focuses on quantifying properties , such as length, mass, temperature, or time, to describe phenomena accurately. Examples of equipment used in quantitative observation include: Thermometers Spectrophotometers Microscopes Telescopes Stopwatches Balances
ایک ماحولیاتی دباؤ _____ کے برابر ہے؟
Answer: 101325 Pascal
Explanation One atmospheric pressure , also known as standard atmospheric pressure. It is defined as 101325 Pascals (Pa). This is the pressure exerted by the weight of the atmosphere at sea level. It is used as a standard unit of pressure.
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