Major Competitive Exams

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Q. What is the main consequence of nuclear fusion? (2023)
  • A. Release of energy
  • B. Formation of heavier elements
  • C. Emission of alpha particles
  • D. All of the above
Q. What is the main consequence of plastic pollution in oceans? (2023)
  • A. Increased fish populations
  • B. Coral reef restoration
  • C. Marine life entanglement
  • D. Improved water quality
Q. What is the main difference between a gas and a plasma?
  • A. Density
  • B. Temperature
  • C. Ionization
  • D. Volume
Q. What is the main difference between a liquid and a gas?
  • A. Shape
  • B. Volume
  • C. Density
  • D. All of the above
Q. What is the main difference between adsorption and absorption?
  • A. Adsorption involves a surface phenomenon
  • B. Absorption is a surface phenomenon
  • C. Both are the same
  • D. Adsorption is faster than absorption
Q. What is the main difference between aldehydes and ketones?
  • A. Position of the carbonyl group
  • B. Number of carbon atoms
  • C. Presence of hydrogen
  • D. All of the above
Q. What is the main difference between alpha and beta radiation?
  • A. Charge
  • B. Mass
  • C. Speed
  • D. Penetrating power
Q. What is the main difference between classical and quantum mechanics?
  • A. Determinism vs. probability
  • B. Energy conservation
  • C. Force laws
  • D. Motion equations
Q. What is the main difference between diffraction and interference?
  • A. Diffraction involves multiple sources, interference does not
  • B. Interference involves multiple sources, diffraction does not
  • C. Diffraction occurs with sound waves only
  • D. Interference occurs with light waves only
Q. What is the main difference between isotopes of an element? (2022)
  • A. Number of protons
  • B. Number of neutrons
  • C. Number of electrons
  • D. Chemical properties
Q. What is the main difference between nuclear fission and nuclear fusion?
  • A. Fission combines nuclei, fusion splits them
  • B. Fission splits nuclei, fusion combines them
  • C. Fission occurs in stars, fusion occurs in reactors
  • D. Fission is safer than fusion
Q. What is the main difference between nuclear fusion and nuclear fission?
  • A. Fusion combines nuclei, fission splits them
  • B. Fusion splits nuclei, fission combines them
  • C. Fusion occurs in stars, fission occurs in reactors
  • D. Both are the same process
Q. What is the main difference between physisorption and chemisorption?
  • A. Temperature dependence
  • B. Nature of forces involved
  • C. Reversibility
  • D. All of the above
Q. What is the main difference between the kingdoms Fungi and Plantae? (2022)
  • A. Cell wall composition
  • B. Mode of nutrition
  • C. Reproductive methods
  • D. All of the above
Q. What is the main disadvantage of asexual reproduction? (2022)
  • A. Slower reproduction rate
  • B. Lack of genetic variation
  • C. Requires more energy
  • D. Involves two parents
Q. What is the main driving force behind adaptive radiation? (1959)
  • A. Environmental changes
  • B. Genetic mutations
  • C. Isolation
  • D. All of the above
Q. What is the main driving force for the movement of water in plants? (2023)
  • A. Root pressure
  • B. Capillary action
  • C. Transpiration pull
  • D. Gravity
Q. What is the main driving force for the movement of water in the xylem?
  • A. Root pressure
  • B. Capillary action
  • C. Transpiration pull
  • D. Gravity
Q. What is the main driving force for the movement of water through the xylem?
  • A. Root pressure
  • B. Capillary action
  • C. Transpiration pull
  • D. Gravity
Q. What is the main effect of deforestation on biodiversity? (2019)
  • A. Increase in species diversity
  • B. Habitat loss
  • C. Improvement in ecosystem services
  • D. Reduction in carbon footprint
Q. What is the main effect of deforestation on the environment? (2019)
  • A. Increased biodiversity
  • B. Soil conservation
  • C. Loss of habitat
  • D. Improved air quality
Q. What is the main effect of heavy metal pollution in water bodies?
  • A. Increased biodiversity
  • B. Eutrophication
  • C. Bioaccumulation
  • D. Oxygenation
Q. What is the main energy source for muscle contraction? (2023)
  • A. Glucose
  • B. Fatty acids
  • C. ATP
  • D. Creatine phosphate
Q. What is the main environmental concern associated with plastic waste? (2022)
  • A. Air pollution
  • B. Soil degradation
  • C. Water contamination
  • D. All of the above
Q. What is the main environmental concern associated with the use of chlorofluorocarbons (CFCs)?
  • A. Ozone layer depletion
  • B. Global warming
  • C. Acid rain
  • D. Water pollution
Q. What is the main enzyme involved in protein digestion in the stomach? (2021)
  • A. Amylase
  • B. Pepsin
  • C. Trypsin
  • D. Lipase
Q. What is the main excretory product of purine metabolism? (2022)
  • A. Urea
  • B. Creatinine
  • C. Uric acid
  • D. Ammonia
Q. What is the main factor that affects the climate of a region? (2022)
  • A. Altitude
  • B. Latitude
  • C. Longitude
  • D. Population
Q. What is the main factor that determines the climate of a region?
  • A. Altitude
  • B. Latitude
  • C. Longitude
  • D. Proximity to water bodies
Q. What is the main factor that determines the type of ecosystem in a particular area? (2019)
  • A. Soil type
  • B. Climate
  • C. Topography
  • D. Human activity
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