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Main Subjects MCQs With Answers
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Which astronomical object was reclassified as a ‘dwarf planet’ by the IAU in 2006?
ACeres
BPluto
CEris
DMakemake
Halley’s Comet orbits the Sun approximately once every how many years?
A25 years
B50 years
C76 years
D100 years
Which planet is referred to as Earth’s ‘Twin’ due to similar size and mass?
AMars
BVenus
CMercury
DNeptune
The boundary beyond which nothing, not even light, can escape a black hole is called:
AAccretion Disk
BEvent Horizon
CSingularity
DPhoton Sphere
Which element is the most abundant in the Earth’s crust by weight?
ASilicon
BAluminum
CIron
DOxygen
What process converts liquid directly into gas below its boiling point?
ABoiling
BEvaporation
CCondensation
DSublimation
Which organ in the human body produces bile?
AGallbladder
BPancreas
CLiver
DStomach
Which functional unit of the human kidney filters blood to produce urine?
ANeuron
BNephron
CAlveoli
DVilli
What is the average lifespan of human Red Blood Cells (RBCs)?
A30 days
B60 days
C120 days
D180 days
Rusting of iron is an example of which type of chemical process?
AReduction
BOxidation
CSublimation
DEvaporation