Main Subjects
Main Subjects MCQs With Answers
0 Main Subjects MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
Computer (406)
Current Affairs (1218)
English (1391)
Everyday Science (827)
General Knowledge (457)
Islamic Studies (850)
Mathematics (1392)
Pakistan Studies (811)
Hydroelectric power plants generate electricity primarily by harnessing the energy of what natural resource?
AWind
BFlowing or falling water
CSunlight
DUnderground heat
What is the key difference between a strong acid and a weak acid in chemistry?
AA strong acid fully ionizes, or breaks apart, in water, while a weak acid only partially ionizes
BA weak acid fully ionizes in water, while a strong acid only partially ionizes
CA strong acid always has a higher pH value than a weak acid
DThere is no meaningful chemical difference between the two, only a difference in taste
Geothermal energy generation primarily relies on harnessing energy from what source?
AOcean tides
BSunlight reflected off clouds
CHeat naturally present within the Earth
DChemical reactions in seawater
Similar to the acid classification, what is the key difference between a strong base and a weak base in chemistry?
AThere is no meaningful chemical difference between the two
BA weak base fully ionizes in water, while a strong base only partially ionizes
CA strong base fully ionizes in water, while a weak base only partially ionizes
DA strong base always has a lower pH than a weak base
Coal, oil, and natural gas are collectively classified as what type of energy resource, since they formed from the remains of ancient organisms over millions of years?
ARenewable energy sources
BFossil fuels
CNuclear fuels
DGeothermal resources
Urea, a nitrogen-containing compound produced by the liver and excreted in urine, is also widely used commercially for what other purpose?
AAs a fuel additive for vehicles
BAs a nitrogen-rich agricultural fertilizer
CAs a common food sweetener
DAs a common building material
Which simple machine consists of a larger wheel rigidly attached to a smaller rod, or axle, so that both rotate together, such as in a doorknob or a car’s steering wheel?
AWedge
BLever
CPulley
DWheel and axle
Starch, a carbohydrate commonly found in foods like potatoes and rice, primarily serves what biological function within plants?
AProviding structural rigidity to plant cell walls
BTransporting water throughout the plant
CAbsorbing sunlight for photosynthesis
DServing as the plant's main form of stored energy
What term describes the phenomenon in which two or more overlapping waves combine to produce a resulting wave with either a larger or smaller amplitude, depending on how their patterns align?
ARefraction
BPolarization
CAbsorption only
DInterference
Cellulose, a tough carbohydrate that forms the primary structural component of plant cell walls, is generally described as what in terms of human digestion?
AToxic to humans in any quantity
BEasily and completely digestible by the human digestive system
CImmediately converted into glucose upon consumption
DLargely indigestible by humans, though it still provides valuable dietary fiber