PPSC PAST PAPERS ALL MCQS 2025 OF EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
Mutualism
Commensalism
Parasitism
Symbiosis
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Explanation
Parasitism is a type of relationship where one organism ( the parasite) lives on or inside another organism (the host)
And benefits at the expense of the host, who is harmed by the interaction.
Population density
Biotic potential
Carrying capacity
Habitat capacity
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Explanation
Carrying capacity refers to the maximum number of individuals of a species that an environment can support over the long term without degrading the environment.
بیٹریاں بنانے میں عام طور پر کون سی دھات استعمال ہوتی ہے؟
Gold
Lead
Zinc
Iron
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Explanation
Lead is commonly used in lead-acid batteries, which are widely used in automotive applications and for backup power systems.
Lead-acid batteries are known for their reliability and relatively low cost.
پاکستان کرکٹ، ہاکی، اسکواش اور اسنوکر کا عالمی چیمپئن کس سال میں تھا؟
1991
1992
1994
1995
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Explanation
In 1994 Pakistan was world champion of: 1. Cricket
2. Hockey
3. Squash
4. Snooker
ماحولیاتی دباؤ ______ کے ساتھ کم ہوتا ہے؟
Increase in longitude
Decrease in altitude
Increase in altitude
Increase in latitude
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Explanation
Atmospheric pressure decreases as altitude increases.
As you go higher , the air pressure decreases because there are fewer air molecules above you , exerting less pressure.
This is why aircraft pilots must adjust their altimeters to account for changes in air pressure as they ascend or descend.
ماحول میں تبدیلیوں کے سلسلے میں سرگرمی ______ ہے؟
Stimulus
Response
Both a & b
None of these
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Explanation
A response is the organism's reaction or adaptation to a change in the environment.
Such as a change in temperature, light, or sound.
وہ مادہ جو آبی محلول میں ہائیڈروجن آئن پیدا کرتا ہے اسے ____ کہتے ہیں؟
Base
Acid
Oxidizing agent
Reducing agent
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Explanation
An acid is a substance that donates a proton (H+ ion) in a reaction, increasing the concentration of hydrogen ions in an aqueous solution.Examples of acids include hydrochloric acid (HCl), sulfuric acid (H2SO4) , and acetic acid (CH3COOH).
پاکستان کی بلند ترین سطح مرتفع کون سی ہے؟
Deosai Plains
Thar Desert
Cholistan Desert
Kirthar Range
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Explanation
The highest plateau in Pakistan is the Deosai Plains
It is a National Park of Pakistan's Highest Plateau Barapani.
is located in the Western Himalayas in Gilgit Baltistan
It was established in 1993
'Deosai') means 'the land of Giants"
It is the second -highest plateau in the world
It has an average elevation of 4,114 meters (13,497 ft) above sea level
ہوا میں آواز کی رفتار ______ ہے؟
143 m/s
243 m/s
343 m/s
443 m/s
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Explanation
The velocity of sound in air at sea level under standard conditions (around 15°C or 59°F) is approximately 343 meters per second (m/s)
The speeds of sound in different materials:
Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s
منہ سے مقعد تک پھیلی ہوئی مسلسل ٹیوب کو ____ کہتے ہیں؟
Respiratory Tract
Alimentary Canal
Nervous System
Circulatory System
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Explanation
The alimentary canal is the digestive tract through which food passes.
It starts from the mouth and ends at the anus.
Key organs include the esophagus, stomach, small intestine, and large intestine.
It is responsible for digestion, absorption of nutrients, and excretion of waste.
The canal is a continuous muscular tube, ensuring smooth passage of food.