BPSC EVERYDAY SCIENCE 25 YEARS PAST PAPERS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
جب سورج، زمین اور چاند کس حالت میں ہوں تو مدّ و جزر سب سے زیادہ ہوتے ہیں؟
- Random position
- Opposite motion
- Straight line
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Highest tides are called Spring tides.
- They occur when the Sun, Earth, and Moon are aligned in a straight line.
- Their gravitational forces combine and produce very high and very low tides.
Last verified on 23-05-2026
کون سا شعبہ زیادہ تر توانائی گاڑیوں کے لیے استعمال کرتا ہے؟
- Transport
- Domestic
- Commercial
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The transport sector uses energy mainly for running vehicles like cars, buses, trucks, trains, and airplanes.
- It depends mostly on petroleum fuels such as petrol, diesel, and CNG.
- This sector is one of the largest consumers of fossil fuels worldwide.
Last verified on 23-05-2026
گھروں میں قدرتی گیس زیادہ تر کس مقصد کے لیے استعمال ہوتی ہے؟
- Cooking and heating
- Transport only
- Mining
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Natural gas is commonly used in homes for cooking food and heating water or rooms.
- It is a fossil fuel mainly composed of methane gas.
- It burns cleaner than coal and oil.
- It producing less smoke and pollution.
Last verified on 23-05-2026
کون سا توانائی کا ذریعہ بہتے ہوئے پانی سے چلنے والی ٹربائنز پر منحصر ہوتا ہے؟
- Hydro
- Solar
- Biomass
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Hydroelectric energy uses flowing or falling water to rotate turbines and generate electricity.
- Dams are commonly built on rivers for hydroelectric power production.
- It is one of the oldest and clean renewable energy sources.
Last verified on 23-05-2026
کون سا حصہ مادّوں کے اندر اور باہر جانے کو کنٹرول کرنے والی رکاوٹ کا کام کرتا ہے؟
- Nucleus
- Cell membrane
- Cytoplasm
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The cell membrane is a thin protective layer surrounding the cell.
- It controls the movement of substances into and out of the cell.
- It is also called the plasma membrane.
- It is selectively permeable.
Last verified on 23-05-2026
درج ذیل میں سے کون سی غذا جسم کی نشوونما اور بافتوں/پٹھوں کی مرمت میں مدد دیتی ہے؟
- Carbohydrates
- Vitamins
- Proteins
- Minerals
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Proteins are called body-building foods.
- They help in growth, repair of tissues, and muscle development.
- They are essential for maintaining and rebuilding body cells.
- They are made of amino acids, the building blocks of the body.
- Deficiency of protein can lead to weak muscles and poor growth.
Last verified on 06-05-2026
کون سی شعاعیں نیوکلیئس سے خارج ہونے والے تیز رفتار الیکٹرانز پر مشتمل ہوتی ہیں؟
- Gamma rays
- Beta rays
- Alpha rays
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Beta radiation consists of high-speed electrons emitted from the nucleus.
- These are produced during beta decay of unstable atoms.
- They are more penetrating than alpha but less than gamma radiation.
- Beta radiation can be stopped by thin metal sheets (like aluminum).
Last verified on 06-05-2026
لیزر کو فائبر آپٹکس میں وسیع پیمانے پر کیوں استعمال کیا جاتا ہے؟
- Low coherence
- High directionality
- Color change
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- LASER stands for “Light Amplification by Stimulated Emission of Radiation.”
- Laser light is highly directional and travels in a narrow beam.
- Fiber optic communication requires focused and efficient light transmission.
- Due to high directionality, signal loss becomes very low.
- Lasers are widely used in communication and medical technology.
Last verified on 22-05-2026
ایسے ایٹمز جن کا ایٹمی نمبر ایک جیسا ہو لیکن نیوٹران مختلف ہوں، انہیں کیا کہتے ہیں؟
- Isotopes
- lons
- Isotones
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Atoms of the same element always have the same atomic number.
- When they differ in the number of neutrons, they are called isotopes.
- Isotopes have similar chemical properties but different masses.
- The concept of isotopes was developed in the early 20th century.
Last verified on 22-05-2026
کون سی شعاع انسانی جسم میں آسانی سے داخل ہو سکتی ہے لیکن کم آئنائزنگ ہوتی ہے؟
- Gamma
- Alpha
- Beta
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Radiation is energy emitted in the form of waves or particles.
- Different types include alpha, beta, and gamma radiation.
- Gamma rays have the highest penetration power.
- They are less ionizing compared to alpha particles but more penetrating.
- Gamma radiation can pass through the human body easily.
Last verified on 22-05-2026
