CSS GENERAL SCIENCE PAST PAPER DATED 13-10-2023
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
نوری سال _____ کی اکائی ہے؟
Light
Distance
Time
None of these
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Explanation
Light Year is the distance that light can travel in one year .
The distance light travels in one year is known as light year .
1 light year is equal to 9.5 x 10¹²km .
آر این اے کا مطلب ______ ہے؟
Ribonucleic Acid
Ready Nucleic Acid
Ribo Nuclear Acid
None of these
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Explanation
RNA stands for Ribonucleic Acid , a molecule essential for protein synthesis and gene expression. It is composed of ribose sugar, phosphate, and nitrogenous bases — hence the name ribo + nucleic acid .
مندرجہ ذیل میں سے کون سی برقی مقناطیسی لہر نہیں ہے؟
Sound Wave
Infrared Rays
Radio Wave
X-Ray
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Explanation
Sound wave is a mechanical wave .
Electromagnetic waves are waves that consist o f oscillating electric and magnetic fields
That propagate through space without needing a medium.
Sound waves, on the other hand, are mechanical waves that require a medium (like air, water, or solids) to travel through.
آسمان نیلے دکھائی دیتا ہے کیونکہ ______؟
Scattering of light from atmosphere
Blue light is scattered the most
Blue light is absorbed
Both A and B
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Explanation
The sky looks blue due to Rayleigh scattering of sunlight by air molecules. Among visible colors, blue light is scattered the most because of its shorter wavelength.
میتھین گیس کا کیمیائی فارمولا کیا ہے؟
CH8
CH4
CH9
CH6
None of these
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Explanation
Methane is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms).
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ایک نوری سال کس کے برابر ہوتا ہے؟
8.46 trillion km
6.46 trillion km
9.46 trillion km
7.46 trillion km
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Explanation
Detailed Answer
One light year is equal to the distance that light travels in one year
(it is about ten trillion kilometers or six trillion miles ).
A light year is a unit of distance.
The distance light travels in one year is known as light year.
A light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometers (9.46 x 1012 km) or 5.88 trillion miles (5.88 x 1012 mi)
میتھین گیس کا کیمیائی فارمولا کیا ہے؟
CH8
CH6
CH4
CH2
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Explanation
Methane is the simplest of saturated hydrocarbons with a chemical formula CH4.
It consists of four hydrogen atoms and one carbon atom.
It is the simplest alkane .
آئرن کی کمی سے کون سی بیماری ہوتی ہے؟
Berberi
Anaemia
Rickets
Scurvy
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Explanation
Iron deficiency can lead to Anaemia , a condition characterized by:
Low red blood cell count Pale skin Fatigue Shortness of breath Dizziness
کووڈ-19 _____ کی وجہ سے ہے؟
Injection
Virus
Bacteria
Mosquito
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Explanation
COVID-19 is caused by a virus , specifically the SARS-CoV-2 virus.
The first infections with SARS-CoV-2 appeared in Wuhan in 2019.
مندرجہ ذیل میں سے کس کو ذہانت کو متاثر کرنے والا عنصر سمجھا جا سکتا ہے؟
Heredity
Environment
Education
All of the above
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Explanation
Intelligence is influenced by multiple factors, including:
heredity ( genetics ) environment ( upbringing, social interactions ) education (access to learning resources and opportunities )
