EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
نرم پانی میں صابن زیادہ جھاگ کیوں بناتا ہے بہ نسبت سخت پانی کے؟
- Soft water neutralizes fatty acids
- Soft water increases surface tension
- Hard water ions form insoluble salts with soap
- None of these
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Explanation
- Soap lathers better in soft water because hard water contains calcium (Ca²⁺) and magnesium (Mg²⁺) ions that react with soap to form insoluble salts.
- These salts reduce soap’s ability to produce foam.
- Soft water does not contain these ions, so soap works fully.
- More soap remains active in soft water for lather formation.
Last verified on 14-06-2026
چارلس کے قانون کی بہترین روزمرہ مثال کون سی ہے؟
- Salt dissolving faster in hot water
- Clothes drying in sunlight
- A balloon shrinking in a freezer
- None of these
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Explanation
- Charles’s Law is best shown by a balloon shrinking in a freezer.
- Because gas volume decreases when temperature decreases.
- When air inside the balloon gets cold, its molecules move slowly.
- This reduces pressure and volume of the gas.
- Warm conditions expand gas, cold conditions contract it.
Last verified on 14-06-2026
ٹھنڈا پانی عام طور پر گرم پانی کے مقابلے میں پیاس کیوں بہتر بجھاتا ہے؟
- Cold water reduces oral temperature, stimulating nerve endings
- Cold water contracts stomach muscles, speeding absorption
- Cold water dissolves salts faster in the bloodstream
- None of these
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Explanation
- Cold water quenches thirst better because it reduces mouth temperature and stimulates nerve endings, giving a stronger refreshing feeling.
- This signals the brain that hydration is occurring.
- The cooling effect provides immediate relief from dryness.
- Warm water does not create this strong sensory response.
- That is why cold water feels more satisfying when thirsty.
Last verified on 14-06-2026
زمین کا محافظ جسم کون سا سیارہ ہے جو زمین کو بہت سے دمدار ستاروں اور سیارچوں سے بچاتا ہے؟
- Mars
- Uranus
- Jupitar
- None of these
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Explanation
- The bodyguard of the Earth is Jupiter, which protects Earth from many comets and asteroids due to its strong gravity.
- Jupiter attracts or deflects space objects that might otherwise hit Earth.
- It is the largest planet in the solar system.
- Its strong gravitational field acts like a “shield” for inner planets.
- That is why it is often called Earth’s protector.
Last verified on 14-06-2026
زمین کے مرکز سے سب سے زیادہ فاصلے پر کون سی پہاڑی چوٹی واقع ہے؟
- Mount Chimborazo
- Nanga Parbat
- K2
- None of these
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Explanation
- Mount Chimborazo is the point on Earth farthest from the Earth’s centre.
- This is because Earth is an oblate spheroid (bulged at the equator).
- Chimborazo is located near the equator in Ecuador.
- Itis about 6,384 km from Earth’s center (approx.).
Last verified on 14-06-2026
مریخ پر سورج غروب ہونے کا رنگ کیا ہوتا ہے؟
- Blue
- Black
- Red
- None of these
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Explanation
- The sunset on Mars appears blue due to how dust scatters sunlight.
- Mars has a thin atmosphere filled with fine dust particles.
- These particles scatter red light away and allow blue light near the sun’s direction.
- This creates a bluish glow around sunset and sunrise.
- It is opposite to Earth’s red/orange sunsets.
Last verified on 14-06-2026
مندرجہ ذیل میں سے کون سا بیان درست نہیں ہے؟
- Light is a form of energy
- Light rays bend when medium is changed
- Light does not carry momentum
- None of these
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Explanation
- The statement “Light does not carry momentum” is incorrect because light does carry momentum.
- Light is a form of energy and can exert pressure (radiation pressure).
- It also bends when passing through different media due to refraction.
- Light actually behaves as both wave and particle.
Last verified on 14-06-2026
بارہ وولٹ کار بیٹری جان لیوا جبکہ 12 وولٹ اے اے بیٹری کیوں محفوظ ہوتی ہے؟
- Very high Internal resistance
- Very Low internal resistance
- Very low external resistance
- None of these
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Explanation
- A 12V car battery is lethal because it has very low internal resistance.
- It allowing it to deliver a very high current.
- An AA battery also has 12V total in combination, but it has much higher internal resistance, so it supplies very low current.
- High current is what makes electric shock dangerous, not just voltage.
- Car batteries can deliver hundreds of amperes instantly.
Last verified on 14-06-2026
مندرجہ ذیل میں سے کون سی چٹان پٹرولیم کی تشکیل کے لیے موزوں ہے؟
- Metamorphic rock
- Sedimentary rock
- Igneous rock
- None of these
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Explanation
- Sedimentary rocks favor the formation and storage of petroleum.
- Petroleum forms from organic matter buried under sediments over millions of years.
- These rocks have porous spaces where oil and gas can accumulate.
- Common examples include sandstone and limestone.
Last verified on 14-06-2026
فرانزک ہینڈ رائٹنگ کے تجزیہ میں، کس خصوصیت کو بھیس بدلنے کے لیے سب سے زیادہ مزاحم سمجھا جاتا ہے؟
- Signature style
- Writing slant
- Pen pressure
- None of these
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Explanation
- Pen pressure reflects the natural force a writer uses while writing, which is very hard to consciously disguise.
- Pressure patterns are mostly unconscious and habitual.
- Forensic experts consider it a highly reliable and resistant feature in handwriting analysis.
Last verified on 14-06-2026
