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.

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2142. The order of succession in a lithosere or xerosere is

by
A. Foliose lichen stage->Crustose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)
B. Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)
C. Moss stage ->Foilose lichen stage-> Crustose lichen stage ->herb stage->shrub stage->forest stage (climax community)
D. Crustose lichen stage->Foilose lichen stage->moss stage-> ->shrub stage-> herb stage->forest stage (climax community)
✅ The correct answer is option B.
Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community).

2144. Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the tops of parked cars, even when the air temperature is above freezing. This condition happens because the tops of the cars are cooling by:

by
A. Conduction
B. Convection
C. Latent heat
D. Radiation
✅ The correct answer is option D.
Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the top of parked cars, even when the air temperature is above freezing. This happens because the tops the tops of the cars are cooled by radiation.

2145. The cutting down of trees and setting them on fire and raising crops on the resulting ash is called:

by
A. Pyrolysis
B. Jhum
C. Taungya system
D. Shift cultivation
✅ The correct answer is option B.
In India, the practice of clearing and burning the forest area for cultivation is known as jhum or jhoom. Slash-and-burn can be part of shifting cultivation, an agricultural system in which farmers routinely move from one cultivable area to another.

2148. Causative organisms of Malaria

by
A. Bacteria
B. Fungus
C. Plasmodium
D. Virus
✅ The correct answer is option C.
Malaria is caused by single-celled protozoan parasites of the genus Plasmodium. Four species infect humans by entering the bloodstream: Plasmodium falciparum, which is the main cause of severe clinical malaria and death; Plasmodium vivax; Plasmodium ovale; and Plasmodium malariae.

2149. Mulching helps in

by
A. soil fertility
B. moisture conservation
C. improvements soil structure
D. soil sterility
✅ The correct answer is option B.
Mulch is any material that is spread or laid over the surface of the soil as a covering. It is used to retain moisture in the soil, suppress weeds, keep the soil cool, and make the garden bed look more attractive. Organic mulches also help improve the soil’s fertility, as they decompose.

2150. The lower limit of water availability in soil is known as

by
A. Field capacity
B. Hypolimnion
C. Thermocline
D. Wilting point
✅ The correct answer is option D.
The permanent wilting point is considered as the lower limit of plant-available soil water and depends upon both plant and soil characteristics. The quantity of water held by the soil between the field capacity and permanent wilting point is considered as the plant-available water.