PPSC PAST PAPERS MCQS 2004 TO 2020 OF EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
ڈی ڈی ٹی کی زیادہ سے زیادہ جمع _____ میں ہوگی؟
- Seagull
- Cerebellar
- Crab
- Phytoplankton
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Explanation
Due to biomagnification, DDT (Dichlorodiphenyltrichloroethane) accumulates more in organisms higher up the food chain.
Seagulls, being top predators, experience the highest deposition of DDT.
مندرجہ ذیل میں سے کون سا جوڑا غلط ہے؟
- Sparrow : Trumpet
- Horse : Neigh
- Monkey : Polytities
- Owl : Chirp
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Explanation
"Polytities" is not a valid or recognized sound made by monkeys.
Monkeys make various vocalizations like screeching, chattering, or howling, but not "polytities".
بائیوم _____ کی کمیونٹی ہے؟
- Plants
- Animals
- Both A and B
- None of these
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Explanation
A biome is a community of both plants and animals that occupy a specific habitat and are adapted to a particular climate and geography.
Biomes can be terrestrial (land-based), freshwater, or marine (ocean-based), and they can vary in size from small to global.
Biomes are composed of:
- Plants (flora)
- Animals (fauna)
- Microorganisms (such as bacteria and fungi)
- Physical environment (climate, soil, water, etc.)
پتھری اور گردے کی پتھری کو صدمے کی لہروں سے ٹکڑے ٹکڑے کرنے کے طریقہ کار کو کیا کہتے ہیں؟
- MRI
- Kidney surgery
- Angiography
- Lithotripsy
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Explanation
Lithotripsy uses sound wave to breakup large kidney stones into smaller pieces.
Lithotripsy is a procedure involving the physical destruction of hardened masses
like kidney stones, bezoars or gallstones, which may be done non invasively.
The term is derived from the Greek words meaning "breaking stones".
وہ مائعات کیا ہیں جو تیزی سے بخارات بن جاتے ہیں، کیا کہلاتے ہیں؟
- Volatile
- Viscous
- Evapurative
- None of the above
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Explanation
Liquids that evaporate quickly are called volatile liquids
Volatility refers to the tendency of a liquid to vaporize or evaporate quickly, often at room temperature or below.
Examples of volatile liquids include:
- Alcohol (e.g., ethanol, isopropanol)
- Acetone
- Gasoline
- Perfumes
- Essential oils
کھانے کو زیادہ پکانے سے گریز کرنا چاہیے کیونکہ یہ _____؟
- Makes the food difficult to digest
- Reduces the nutritive value of food
- Increases the nutrition value of food
- Makes the food toxic
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Explanation
Overcooking can lead to a reduction in the nutritional value of food.
It especially water-soluble vitamins like vitamin C and B vitamins.
As they can be lost in the cooking water or destroyed by heat.
خون میں ایس جی او ٹی/اے ایس ٹی کی سطح میں اضافہ ______ کا اشارہ ہے؟
- Hepatitis
- Anemia
- Tuberculosis
- Myocardial infarction
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Explanation
SGOT (Serum Glutamic-Oxaloacetic Transaminase) and AST (Aspartate Transaminase) are enzymes found in the liver.
Elevated levels of SGOT/AST in the blood indicate liver damage or inflammation, which can be a sign of:
- Hepatitis (liver inflammation)
- Liver cirrhosis
- Liver cancer
- Liver damage due to drugs or toxins
زمین کے ماحول میں موجود کون سی گیس شمسی الٹرا وائلنٹ شعاعوں کو جذب کر سکتی ہے؟
- Oxygen
- Ozone
- Carbon Dioxide
- Nitrogen
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Explanation
The ozone layer protects living things from too much ultraviolet from entering the atomsphere.
Oxygen layer in the atmosphere
Ozone protects us from the harmful ultraviolet radiation of the sun.
Ozone formula: O3
The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.
The ozone layer is depleting: Air pollution
خطرناک فضلہ سے منسلک سب سے اہم ماحولیاتی خطرہ کیا ہے؟
- Increased use of land for landfills
- Destruction of Habitat
- Air pollution
- Contamination of Ground water
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Explanation
The most serious environmental effect posed by hazardous wastes is Contamination of Groundwater.
Toxic substances from hazardous waste can seep into the soil and contaminate underground water sources.
It affecting ecosystems and human health.
کون سا پرندہ کنکریاں کھاتا ہے جو کھایا ہوا کھانا پیس کر ہاضمے میں مدد کرتا ہے؟
- Pigeon
- Hen
- Ostrich
- Owl
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Explanation
Ostriches, like some other birds, eat pebbles and small stones to help with digestion.
They swallow these pebbles, which then accumulate in their gizzard, a muscular organ in the digestive system.
The pebbles help grind up the food.
It especially tough plant material, in the gizzard, making it easier to digest.
This process is called "grit digestion".