General Science Class 9 MCQs MCQs - General Science Practice | PakExamPoint
Practise General Science Class 9 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
General Science Class 9 MCQs MCQs and revision practice
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.
کھادوں کی زیادہ حل پذیری بھی _____ کے ذریعے ماحولیاتی نظام کو خراب کرتی ہے؟
A. Acidification
B. Salinity
C. Erosion
D. Eutrophication
Check answer and explanation
Answer: Eutrophication
Explanation Eutrophication occurs when excess nutrients from fertilizers enter water bodies, stimulating excessive plant growth and depleting oxygen, harming aquatic life. This can lead to the formation of "dead zones" where few organisms can survive, degrading the ecosystem.
Explanation Barium is an alkaline earth metal , which is a group of elements in the periodic table that includes: Magnesium (Mg) Calcium (Ca) Strontium (Sr) Barium (Ba) Radium (Ra) These elements are in group 2 (formerly group IIA) of the periodic table.
مندرجہ ذیل میں سے کون سی گیس سب سے تیزی سے پھیلتی ہے؟
A. Chlorine
B. Fluorine
C. Helium
D. Hydrogen
Check answer and explanation
Answer: Hydrogen
Explanation Hydrogen is typically the gas that diffuses the fastest because it has the lowest molar mass. Molecular weight of 2.016 g/mol. According to Graham's Law of Diffusion, the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight. Therefore, hydrogen diffuses the fastest.
Explanation The secondary cell wall , found in plant cells, is primarily composed of: Cellulose (a polysaccharide, the main component of plant cell walls) Lignin (a complex organic compound that provides strength and rigidity)
مندرجہ ذیل میں سے کس کو جسمانی ذرائع سے الگ کیا جا سکتا ہے؟
A. Mixture
B. Compound
C. Element
D. Substance
Check answer and explanation
Answer: Mixture
Explanation A mixture is a physical combination of two or more substances that can be separated by physical means, such as: Filtration Sedimentation Decantation Distillation Chromatography
میٹا فیز کے دوران ہومولوگس کروموسوم خود کو _____ پر ترتیب دیتے ہیں؟
A. Equator of the spindle
B. Poles of the spindle
C. Center of the cell
D. Randomly in the cytoplasm
Check answer and explanation
Answer: Equator of the spindle
Explanation During metaphase, homologous chromosomes (pairs of chromosomes that contain the same genes) arrange themselves on the equator of the spindle , also known as the metaphase plate. This is a critical step in the cell division process , ensuring that each daughter cell receives a complete set of chromosomes.
Explanation The odd one out is Active transport. Active transport requires energy (ATP) to move substances against their concentration gradient. Whereas diffusion, facilitated diffusion and osmosis are passive processes.
Explanation To find the area of the chip wrapper , you multiply the length by the width: Area = Length x Width = 4.5 cm x 5.9 cm = 26.55 cm^2 So, the area of the chip wrapper is 26.55 cm^2.
Explanation The rough endoplasmic reticulum (RER) is responsible for synthesizing proteins, which are then transported to other parts of the cell or secreted outside. The RER has ribosomes attached to its surface , where protein synthesis occurs.
کسی جاندار کا سائنسی نام لکھنے کا درج ذیل میں سے کون سا طریقہ درست ہے؟
A. Houbara bustard
B. E.coli
C. Alium Cepa
D. Canis lupis
Check answer and explanation
Answer: Houbara bustard
Explanation The correct way of writing a scientific name of an organism is in italics, with the genus capitalized and the species in lowercase. Therefore, the correct example among the options should be: Houbara bustard.
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