SAU PAST PAPER 2020
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- Ecercise
- Exercize
- Exercise
- None of these
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Explanation
Exercise means ورزش
- Deteriorasion
- Detorioration
- Deterioration
- None of these
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Explanation
Deterioration means بگاڑ
- Good
- Widely
- A
- None of these
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Explanation
The word "good" is an adjective, but it should be an adverb to describe how it absorbs gases.
The correct word should be "well."
ایک نینوومیٹر ______ کے برابر ہے؟
- 1 × 10^-6 meter
- 1 × 10^-9 meter
- 1 × 10^-3 meter
- None of these
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Explanation
A nanometer (nm) is equal to one-billionth of a meter, written in scientific notation as 1 × 10⁻⁹ m or 0.000000001 meters.
It is commonly used to measure objects at the atomic and molecular scale.
مرکزی نیوکلئس والے ایٹم کا تصور _____ کے ذریعہ متعارف کرایا گیا تھا؟
- Rutherford
- Bohr
- J. J. Thomson
- None of these
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Explanation
Ernest Rutherford (1911) proposed the nuclear model of the atom with a dense central nucleus.
This came after his gold foil experiment, which showed atoms have a small, positively charged core.
He was a New Zealand-born British physicist who came to be known as the father of nuclear physics.
ٹیبل نمک کا کیمیائی فارمولا کیا ہے؟
- NaCl
- KCl
- CaCl₂
- MgSO₄
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Explanation
It is an ionic compound with the chemical formula NaCl.
It representing a 1:1 ratio of sodium and chloride ions.
Table salt is the granulated white salt seen in most saltshakers.
It is typically mined from underground deposits.
It is commonly known as Sodium chloride.
مندرجہ ذیل میں سے کون سا زندہ جسموں میں توانائی کا براہ راست ذریعہ ہے؟
- Glucose
- Fatty acid
- ATP
- None of these
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Explanation
ATP (Adenosine Triphosphate) is the direct source of energy in living bodies.
Glucose and fatty acids provide energy indirectly, but ATP is the immediate usable energy currency.
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)
مندرجہ ذیل میں سے تمام نامیاتی مرکبات ہیں سوائے _____؟
- Water
- Alcohol
- Chloroform
- Ethane
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Explanation
Water (H₂O) is an inorganic compound as it does not contain carbon-hydrogen (C-H) bonds.
Alcohol, chloroform, and ethane are organic compounds because they contain carbon atoms bonded to hydrogen.
مطلق درجہ حرارت درجہ حرارت ہے جس میں _____؟
- Mass becomes zero
- All molecular motion ceases
- Volume becomes zero
- None of these
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Explanation
Absolute temperature (0 K) is the theoretical lowest temperature.
At this point, all molecular motion stops, and the system has minimum internal energy.