PPSC PAST PAPERS ALL MCQS 2022 OF EVERYDAY SCIENCE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
وہ کون سا سیارہ ہے جس کا حجم زمین جیسا ہے؟
- Venus
- Mars
- Uranus
- None of these
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Explanation
Venus
Eight planets in the solar system
Venus is the hottest planet in the solar system
The black planet is called Venus
The second closest planet to the sun is Venus
Which is the slowest Rotating Planet? Venus
Which planet has no moon? Venus
Number of moons in Venus: 0
Which planet has a similar size to Earth? Venus
سورج کی روشنی وٹامن کا ایک اچھا ذریعہ کونسا وٹامن ہے؟
- D
- A
- B
- C
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Explanation
- Sunlight is a good source of vitamin D.
- When our skin is exposed to sunlight, it produces vitamin D.
- It is essential for bone health, immune function, and the regulation of calcium levels in the blood.
صابن ____ کی وجہ سے کپڑوں سے گندگی کو دور کرتے ہیں۔
- Capillary action
- Osmosis
- Diffusion
- Lowering of inter-facial tension
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Explanation
When the soap is in the form of micelles then it has the ability to clean the oily dirt which gets accumulated at the centre.
These micelles remain as colloidal solutions.
Therefore, the dirt from the cloth is easily washed away.
انسانی آبادی کا شماریاتی مطالعہ کیا کہلاتا ہے؟
- Biography
- Demography
- Pedology
- None of these
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Explanation
Demography is the statistical study of the human population,
Including aspects such as size, structure, distribution, and dynamics.
It examines factors like birth and death rates, migration, age, sex, and occupation, among others.
انسانی آبادی کا شماریاتی مطالعہ ڈیموگرافی کہلاتا ہے۔
خصوصی نظریہ اضافیت کس نے دیا تھا؟
- Newton
- Albert Einstein
- Darwan
- None of these
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Explanation
The theory of relativity usually encompasses two interrelated theories by Albert Einstein:
They were proposed and published in 1905 and 1915
E =mc2
C in this equation, the velocity of light
- Copper and Nikal
- Copper and Tin
- Copper and Steel
- None of these
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Explanation
Bronze is mainly made of copper with about 12–12.5% tin as the primary additive.It is stronger and harder than pure copper, making it useful for tools, weapons, and sculptures.
- Sodium hydroxide and Hydrochloric acid
- Sodium hydroxide and Hydrochloride acid
- Sodium and Hydrochloric acid
- None of these
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Explanation
When NaCl (sodium chloride) is added to H₂O (water),
The solid salt dissolves and dissociates into its constituent ions, sodium (Na⁺) and chloride (Cl⁻),
Forming an aqueous solution called brine.
The equation for this process is:
NaCl(s) + H₂O(l) → Na⁺(aq) + Cl⁻(aq)
کون سے عوامل ابلتے ہوئے نقطہ کو متاثر کرتے ہیں؟
- Air pressure
- Temperature
- Pressure
- None of these
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Explanation
For water, the boiling point is 100ºC at a pressure of 1 atm
The boiling point of water decreases at higher altitudes due to Low atmospheric pressure
The boiling point of water increases with increased atmospheric pressure
The boiling point of water decreases with decreased atmospheric pressure
ND17-1-2023
پانی کے مالیکیولز کی زیادہ ارتکاز والے علاقے سے کم ارتکاز والے خطے میں نیم پارمیبل جھلی کے ذریعے حرکت کرنے کے عمل کو کیا کہا جاتا ہے؟
- Induction
- Transportation
- Conduction
- Osmosis
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Explanation
Osmosis is the movement of water molecules through a semipermeable membrane from an area of higher water concentration to lower concentration.
It is a vital process in biological systems for maintaining cell balance.
درجہ حرارت کی ایس آئی یونٹ کیا ہے؟
- Kelvin
- Centigrade
- Fahrenheit
- None of these
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Explanation
The SI unit of temperature as per the International System of Units is Kelvin.
It is represented by the symbol K.
Note:
Celsius is currently a derived unit for temperature in the SI system, Kelvin is the base unit.
