GENERAL SCIENCE CLASS 9 MCQS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
رفتار کے تحفظ کا قانون اس بات کی وضاحت کرتا ہے کہ تصادم سے پہلے اور بعد میں دو اجسام کے نظام کی کل رفتار ______؟
Remains constant
Retains more momentum
Losses some momentum
None of the above is true
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Explanation
The law of conservation of momentum states that the total momentum of a closed system (such as a system of two bodies) remains constant over time, as long as there are no external forces acting on the system.
This means that the total momentum before a collision is equal to the total momentum after the collision.
200 watt
20 watt
2 watt
0.2 watt
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Explanation
Power is calculated as the rate of work done or energy transferred:
Power = Work / Time
= 20 J / 10 s
= 2 W
So, the machine's power output is 2 watts.
پورے عرصے میں تحفظ کا اثر ______ ہے؟
Increases
Decrease
Moderate
Same
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Explanation
The shielding effect decreases across a period. This is because the increasing nuclear charge is not fully counterbalanced by the same number of inner electrons, resulting in a weaker shielding effect.
حیاتیاتی عناصر جو زندگی کے لیے اہم سمجھے جاتے ہیں وہ ______ اراکین یا تعداد میں ہوتے ہیں۔
13
12
14
16
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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)
وولووکس _______ کی پولی فیلیٹک جینس ہے؟
Green algae
Red algae
Brown algae
None of these
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Explanation
Volvox is a genus of green algae that includes about 20 species of aquatic, photosynthetic organisms.They are characterized by their spherical or ellipsoidal shape and are typically found in freshwater environments.Volvox species are known for their unique colony structure , which consists of a hollow sphere of cells surrounding a central cavity.
مینڈک کا سائنسی نام ___ ہے؟
Palaeon
Rana tigrina
Periplaneta
Pheretima
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Explanation
Rana tigrina, also known as the Asian giant toad or the Indian bullfrog.It is a species of frog found in Southeast Asia and the Indian subcontinent.
انسانی دل میں پھیپھڑوں سے لوٹنے والا خون پہلے _____ میں جاتا ہے؟
Left atrium
Left ventricle
Right atrium
Right ventricle
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Explanation
In the human heart, blood returning from the lungs via the pulmonary veins drains into the left atrium.From there, it flows through the mitral valve into the left ventricle, which pumps it out to the rest of the body through the aorta.
مندرجہ ذیل میں سے کون سا پانی کے ساتھ کمزور الیکٹرولائٹ محلول بناتا ہے؟
CH₃COOH
H₂SO₄
NaCl
None of these
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Explanation
Acetic acid (CH3COOH) is a weak acid that only partially dissociates in water, forming a weak electrolyte solution.
It does not fully dissociate into ions like strong acids (like HCl) or strong bases (like KOH).
فوسلز کی مدد سے دور دراز ماضی کی نامیاتی زندگی کا مطالعہ کو کیا کہا جاتا ہے؟
Entomology
Paleontology
Taxonomy
Histology
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Explanation
Paleontology is the scientific study of fossils and ancient life forms, focusing on the history of life on Earth, evolution, and extinction.Paleontologists use fossils to reconstruct the biology, ecology, and behavior of ancient organisms.
وراثتی حالت جو خون کے ہیموگلوبن کو متاثر کرتی ہے جسے _____ کہا جاتا ہے؟
Sickle Cell Disease
Hemophilia
Leukemia
Thalassemia
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Explanation
Thalassemia is a genetic disorder that affects the production of hemoglobin, a protein in red blood cells that carries oxygen to the body's tissues.
It is characterized by abnormal hemoglobin production , leading to anemia, fatigue, and other complications.