PPSC PAST PAPERS EVERYDAY SCIENCE MCQS 2026
پیپر میں جانے سے
پہلے یہ سوالات و سلیبس ایک بار ضرور پڑھ کر جائیں
PPSC 25
years Past Papers Click here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
بایوگیس کا بنیادی جزو کیا ہے؟
- Hydrogen
- Oxygen
- Methane
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion.
The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia.
ایک گیند عمودی طور پر اوپر کی طرف پھینکی جاتی ہے۔ کشش ثقل کی وجہ سے ایکسلریشن _____؟
- 0.7 m/s^2 Vertical
- 9.8 m/s^2 Downward
- 9.8 m/s^2 Upward
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The acceleration due to gravity is 9.8 m/s² downward.
- This force acts on the ball throughout its motion.
- This pulling it back to the ground after it is thrown upwards.
Last updated 27-07-2026 by NA
مخصوص مسکن میں رہنے والے مختلف انواع کے ارکان کو ____ کہتے ہیں؟
- Community
- Population
- Ecosystem
- Biomes
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
A community refers to all the different species living in a specific habitat or area,
interacting with each other and their environment.
It includes plants, animals, microorganisms, and even fungi.
While A localized group of organisms that belong to the same species is called a population.
مندرجہ ذیل میں سے کون سی گیس سب سے تیزی سے پھیلتی ہے؟
- Hydrogen
- Chlorine
- Fluorine
- Helium
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Hydrogen is typically the gas that diffuses the fastest because it has the lowest molar mass.
Molecular weight of 2.016 g/mol.
According to Graham's Law of Diffusion, the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight.
Therefore, hydrogen diffuses the fastest.
فتوسنتھیسس کے دوران پیدا ہونے والا بنیادی مالیکیول ______ ہے؟
- Glucose
- Amino acid
- Fatty acid
- Nucleotide
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The fundamental molecule produced during photosynthesis is glucose
Key Product: Glucose (sugar/carbohydrate) is the main energy-storing molecule.
Purpose: It is used for plant respiration and as a building block for cellulose.
By-product: Oxygen is also produced and released into the atmosphere
جب درختوں اور فوسل فیول کو جلایا جاتا ہے تو کون سی گیس پیدا ہوتی ہے؟
- Carbon monoxide
- Carbon dioxide
- Nitrogen oxide
- Oxygen
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Carbon dioxide (CO2) is produced when trees and fossil fuels are burned, through a process called combustion.
- Combustion releases carbon dioxide and water vapor into the atmosphere.
فوڈ چین میں لیولز کی صحیح ترتیب کیا ہے؟
- Producer → Consumer → Decomposer
- Consumer → Producer → Decomposer
- Decomposer → Producer → Consumer
- Consumer → Decomposer → Producer
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The correct order of the levels in a food chain is:
- Producer (plants and algae that produce their own food through photosynthesis)
- Consumer (animals that eat producers or other consumers)
- Decomposer (organisms like bacteria and fungi that break down dead plants and animals)
Last updated 17-02-2026
نظام شمسی میں کون سا سیارہ سب سے زیادہ کثافت رکھتا ہے؟
- Saturn
- Earth
- Jupiter
- Naptune
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Earth has the highest density of any planet in the Solar System, at 5.514 g/cm3.
This is considered the standard by which other planet's densities are measured.
گرین ہاؤس اثر سے ہمارا کیا مطلب ہے؟
- Ability of atmosphere to retain water vapor
- Ability of atmospheric gases to trap heat
- Ability to keep the planet relatively warm
- Ability of cloud to scatter electromagnetic radiation
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The greenhouse effect occurs when certain gases in the atmosphere trap heat from the Sun.
- Key greenhouse gases include CO₂, CH₄ (methane), N₂O, and water vapor.
- These gases allow sunlight to enter but absorb and re-radiate infrared radiation back to Earth.
- This process warms the planet, making life possible.
گرین ہاؤس اثر کا سبب بنتا ہے۔
- Global warming
- Cooling
- Planets to grow better
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- The greenhouse effect causes global warming
- When heat-trapping gases in Earth's atmosphere absorb and re-emit outgoing infrared radiation, raising global temperatures
- Natural Effect: Keeps Earth warm and supports life.
- Main Gases: CO₂, methane (CH₄), water vapor, and N₂O.
- Excess CO₂: Increases the greenhouse effect.
Last updated 27-07-2026 by NA
