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.
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زمین کا قدرتی سیارہ کیا کہلاتا ہے؟
Answer: Moon
Explanation The Moon is Earth’s only natural satellite . Diameter – 3,474 km Distance from Earth – 384,400 km Orbital period – 27.3 days Surface gravity – 1/6th of Earth First human landing – Apollo 11, 1969 Last verified on 18-03-2026
ہائیڈروجن پیرو آکسائیڈ کا تجرباتی فارمولا _______ ہے؟
Answer: HO
Explanation The empirical formula of hydrogen peroxide (H2O2) is HO . The empirical formula is the simplest whole-number ratio of atoms of each element in a compound. In this case, the ratio of hydrogen to oxygen is 1:1, which is represented by the formula HO.
پی ایچ میں انزائم کی تبدیلیاں انزائمز کو ______ کا سبب بن سکتی ہیں؟
Answer: Denature
Explanation Changes in pH can cause enzymes to denature, losing their native structure and activity. This is because enzymes are highly specific to their optimal pH range. Changes in pH can disrupt the delicate balance of charges and hydrogen bonds that maintain the enzyme's active structure.
پرنٹ ہونے پر کسی بھی جاندار کا سائنسی نام _____ ہونا چاہیے۔
Answer: Italicized
Explanation Scientific names of organisms , also known as binomial nomenclature, should be printed in italics. This is a universal convention in scientific writing to distinguish the scientific name from the rest of the text.
Answer: 9.0 gm/cm^3
Explanation To find the density of the steel balls , we need to use the formula for density: Density = Mass/Volume 1. Calculate the total mass of the steel balls: Each ball has a mass of 27 g, and there are 10 balls. Total mass = 10 x 27 = 270 g 2. Calculate the volume displaced by the steel balls: The initial volume of water is 20 cm^3 The final volume of water is 50 cm^3 The volume displaced by the steel balls is: Volume displaced = 50 cm^3 - 20 cm^3 = 30 cm^3 3. Calculate the density of the steel : Using the total mass and the volume displaced: Density = 270 g / 30cm,^3 = 9.0 g/cm^3 Therefore, the density of the steel is 9.0 g/cm^3.
حیاتیاتی عناصر جو زندگی کے لیے اہم سمجھے جاتے ہیں وہ ______ اراکین یا تعداد میں ہوتے ہیں۔
Answer: 16
Explanation The number of bioelements considered vital for life is 16 . These essential elements include: Carbon (C) Hydrogen (H) Oxygen (O) Nitrogen (N) Phosphorus (P) Sulfur (S) Potassium (K) Calcium (Ca) Magnesium (Mg) Iron (Fe) Sodium (Na) Chlorine (Cl) Copper (Cu) Zinc (Zn) Manganese (Mn) Iodine (I)
دل کے پٹھوں کو آرام دینا اور چیمبروں کو خون سے بھرنے دینا ____ کہلاتا ہے؟
Answer: Diastole
Explanation Diastole is the phase of the cardiac cycle where the heart muscle relaxes. It allowing the chambers to fill with blood.
توانائی کے اخراج کے لیے خوراک کے مالیکیولز کے ٹوٹنے کو ____ کہتے ہیں؟
Answer: Respiration
Explanation The breakdown of food molecules to release energy is called cellular respiration. This process involves breaking down glucose and other molecules in the presence of oxygen to produce energy in the form of ATP (adenosine triphosphate). Cellular respiration occurs in the mitochondria of cells.
ڈیٹا آرگنائزیشن میں، کون سا طریقہ زیادہ تر مفید ہے؟
Answer: Both a and b
Explanation Tables and graphs are both essential methods for organizing and visualizing data, and they complement each other. Tables are useful for: Displaying precise values and data points Organizing large datasets Performing calculations and data analysis Graphs are useful for: Visualizing trends and patterns Displaying relationships between variables Communicating complex data insights effectively
کلوروپلاسٹ میں مختلف روغن مختلف _____ کی روشنی کو جذب کرتے ہیں؟
Answer: Wavelength
Explanation Chloroplasts contain various pigments like chlorophyll, carotenoids, and phycobiliproteins, which absorb light of different wavelengths. This allows plants to capture a broad spectrum of light energy and use it for photosynthesis.
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