GENERAL SCIENCE CLASS 8 MCQS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
Kg
Km
W
N
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Explanation
The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) , and tonne (t). 1000 g = 1 kg. 1000 kg = 1 tonne.
Mass was first defined in 1795
Symbol : M
مندرجہ ذیل میں سے کون سی نائٹروجن بیسز کی قسم نہیں ہے؟
Adenine
Thymine
Tracil
Cytosine
Guanine
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Explanation
There is no such nitrogenous base as "Tracil or Uracil ". The nitrogenous bases are:
Adenine (A) Thymine (T) Cytosine (C) Guanine (G)
مرکزی اعصابی نظام _____ پر مشتمل ہے؟
Brain, Spinal Cord
Cerebrum, Thalamus and Hypothalamus
Cerebrum, Pons and Medulla oblongata
Cerebellum, Brain and Nerves
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Explanation
The Central Nervous System (CNS) comprises the:
These two structures are the core of the nervous system,
The brain controls how we think, learn, move, and feel. The spinal cord carries messages back and forth between the brain and the nerves that run throughout the body..
آپٹیکل سینٹر اور پرنسپل فوکس کے درمیان فاصلے کو ____ کہا جاتا ہے؟
Focal Length
Focal Point
Optical Centre
Centre of Curvature
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Explanation
Focal length is the distance between the optical center of a lens or mirror and its principal focus. It determines how strongly the lens or mirror converges or diverges light.
مقعر لینز کو ______ کے نام سے بھی جانا جاتا ہے؟
Converging Lens
Diverging Lens
Cylindrical lens
None
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Explanation
Concave lenses are also known as diverging lenses. Shape: Thinner in the middle and thicker at the edges. Image: They produce smaller, upright, virtual images. Use: Often used in eyeglasses to correct myopia (nearsightedness).
Last updated on 09-03-2026
سائٹرک ایسڈ ____ میں پایا جاتا ہے؟
Lemons
Apple
Mango
Banana
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Explanation
Citric acid occurs naturally in:
Lemons, Limes, Pineapples, Grapefruits, Berries (not blueberries), Tomatoes, Broccoli, Carrots, and some varieties of Peppers.
کون سا مادہ غیر جانبدار کے قریب پی ایچ قدر رکھتا ہے؟
Ammonia
Blood
Milk
Organic juice
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Explanation
Blood has a pH level of around 7.3, which is closest to neutral (pH 7).
حجم کی ایس آئی یونٹ _____ ہے؟
m³
m²
n²
None of these
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Explanation
The SI unit of volume is the cubic meter (m3), which is a derived unit.
1 m3 = 1 m • 1 m • 1 m.
***
The SI unit of energy/work is the joule (J)
The SI unit of charge is Coulomb
The Pascal is the SI-derived unit of pressure
The ampere, symbol A , is the SI unit of electric current.
The SI unit of power is the watt, one joule per second.
The SI unit of electric resistance is the ohm (Ω).
The SI unit of temperature as per the International System of Units is Kelvin
Unit of torque: newton metre ( N m )
The SI unit of velocity is a meter per second (m/s).
The SI unit of acceleration is meters/second2 (m/s2)
ایس آئی سسٹم میں برائٹ شدت کی اکائی _____ ہے؟
Lumen (lm)
Watt (W)
Candela (cd)
Lux (lx)
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Explanation
The Candela (cd) is the SI unit of luminous intensity. It is defined as the luminous intensity of a monochromatic source that emits light at a frequency of 540 x 10^12 Hz with a luminous efficiency of 683 lm/W.
ایک افقی لکیر جو عینک سے گزرتی ہے ____ کہلاتی ہے؟
Focal Point
Optical Centre
Centre of Curvature
Principal Axis
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Explanation
The principal axis is a horizontal line that passes through the centre of the lens, perpendicular to its surface. It is the central axis around which the lens is symmetrical.
