GENERAL SCIENCE
MCQ Question with Answers Class 1 to 12 in Pdf
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
دن کے وقت، زمین کے اوپر کی ہوا اپنی کثافت کو گرم کرتی ہے ____؟
Increase
Decrease
Remain same
Fluctuate
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Explanation
When the air above the land is heated during the daytime , its density decreases. This is because warm air expands and becomes less dense than cold air.
حرارت ____ سے وابستہ توانائی کی ایک شکل ہے؟
Atomic Stability
Molecular Motion
Nuclear Reaction
Electromagnetic Radiation
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Explanation
Heat is a form of energy associated with the motion of molecules in a substance. As molecules vibrate, rotate, and collide , they transfer energy from one another, resulting in the sensation of heat.
عام انسانی کان کی قابل سماعت حد ____ ہے؟
16 Hz to 20kHz
10 Hz to 31kHz
67 Hz to 45kHz
20 Hz to 20kHz
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Explanation
The audible range of a normal human ear is typically considered to be between 20 Hz (very low frequency) and 20,000 Hz (very high frequency). This range encompasses the vast majority of sounds that humans can perceive, from the lowest rumble to the highest pitch.
جو جانور صرف پودے کھاتے ہیں انہیں کیا کہا جاتا ہے؟
Carnivores
Omnivores
Herbivores
None of these
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Explanation
Herbivores are animals that eat only plants , including leaves, stems, roots, flowers, fruits, and seeds. Examples of herbivores include cows, deer, rabbits, and elephants.
پانی کی زیادہ سے زیادہ کثافت _____ ہے؟
2°C
3°C
4°C
5°C
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Explanation
Water has maximum density at 4°C .
When Water is in its Solid form (Ice) below 0°C .
مندرجہ ذیل میں سے کون سی گلوبل وارمنگ کی وجہ ہے؟
Presence of sulphite
Rise in CO2 concentration
Oxides of nitrogen
Formtion of ozone
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Explanation
Global warming is primarily caused by the increasing levels of carbon dioxide (CO2) in the Earth's atmosphere , which traps heat and leads to a warming effect.
The main reason for this increase is human activities such as :
Burning fossil fuels like coal, oil, and gas Deforestation and land-use changes
mol dm^-3
mol^-2 dm^6
mol^-1dm3
No unit
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Explanation
The equilibrium constant, Kc, for the reaction:
N2 + O2 ⇌ 2NO is unitless (No unit).
Since the number of moles of gas is the same on both the reactant and product sides (2 moles).
The concentration terms in the equilibrium constant expression cancel out, leaving Kc without units.
جب سفید روشنی کسی پرزم سے گزرتی ہے تو یہ کتنے رنگوں میں تقسیم ہو جاتی ہے۔
7
8
2
4
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Explanation
When white light passes through a prism, it splits into 7 colors , forming a spectrum known as a rainbow :
Red Orange Yellow Green Blue Indigo Violet The separation of visible light into its different colours is known as dispersion.
سینٹی گریڈ پیمانے پر پانی کا ابلتا نقطہ کیا ہے؟
80°C
90°C
100°C
10°C
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Explanation
The freezing point of water is 0°C (zero degrees Centigrade). The boiling point of water on the Centigrade scale ( also known as the Celsius scale ) 100°C (one hundred degrees Centigrade).
ناسا کس ملک کی خلائی ایجنسی ہے؟
Russia
America
England
Germany
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Explanation
The National Aeronautics and Space Administration is an independent agency of the U.S. federal government
NASA is responsible for the civil space program, aeronautics research, and space research.
NASA stands for National Aeronautics and Space Administration
NASA Headquarters: Washington
NASA Founder : Dwight D. Eisenhower
NASA Founded : July 29, 1958