General Knowledge

Boost your exam preparation with the latest General Knowledge MCQs with answers and explanations. Our collection covers current affairs, world geography, history, Pakistan studies, sports, science, technology, and important international organizations. These General Knowledge multiple-choice questions are designed for students, job seekers, and competitive exam aspirants preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and recruitment exams. Practice online with updated General Knowledge MCQs to improve awareness, sharpen memory, and score higher in tests and interviews.

📘 Awards and Honours MCQs
📘 Basic General Knowledge MCQs
📘 Biology MCQs
📘 Books and Authors MCQs
📘 CAPITAL & FAMOUS CITIES
📘 Chemistry MCQs
📘 Days and Years MCQs
📘 Environmental Science MCQs
📘 Famous Personalities MCQs
📘 Famous Places in India MCQs
📘 General Science MCQs
📘 GK
📘 Honours and Awards MCQs
📘 Indian Culture MCQs
📘 Indian Geography MCQs
📘 INTERNATIONAL AFFAIRS
📘 Inventions MCQs
📘 Physics MCQs
📘 Sports MCQs
📘 Teaching and Research MCQs
📘 Technology MCQs
📘 World Geography MCQs
📘 World Organisations MCQs

1511. In the atmosphere, tiny solid or liquid suspended particles of various composition are called:

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A. Aerosols
B. Carcinogens
C. Greenhouse gases
D. Microbes
✅ The correct answer is option A.
Aerosols are tiny solid or liquid particles that are suspended in the air. Most aerosols are microscopic and too small to see individually without a microscope. Aerosols include things like dust, pollen, smoke, and even cloud droplets.

1512. The unit of measurement of intensity of sound is in _________

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A. Decibels
B. Lux
C. Parsec
D. Candela
✅ The correct answer is option A.
Although the units for sound intensity are technically watts per meter squared, it is much more common for it to be referred to as decibels, dB. A decibel is a ratio of the observed amplitude, or intensity level to a reference, which is 0 dB.

1515. Favorable morphological and physiological response to a change in environment is called

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A. Preadaptation
B. Ecotyping
C. Formation of ecophenes
D. Acclimatisation
✅ The correct answer is option D.
Acclimatisation is the process in which an individual organism adjusts to a change in its environment (such as a change in altitude, temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions. Hence, the correct answer is ‘Acclimatisation’.

1517. The change of state of ice into water vapour is known as:

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A. Deposition
B. Sublimation
C. Melting
D. Condensation
✅ The correct answer is option B.
When ice turns directly into water vapor without first transitioning into a liquid, it is referred to as “sublimation.” In fact, any solid that turns into a vapor without going through the liquid phase can be said to sublime or “sublimate.”

1519. The primary cause of a radiation inversion is:

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A. Infrared radiation emitted by the earth’s surface
B. Infrared radiation absorbed by the earth’s surface
C. Solar radiation absorbed by the earth’s surface
D. Solar radiation reflected by the earth’s surface
✅ The correct answer is option A.
A relatively cool layer of air, usually adjacent to a ground surface cooled by net loss of radiation, in which the air temperature increases with height.