Natural Science MCQs (401–450) – Page 9
Advanced & Exam-Oriented Science MCQs
- Which phenomenon explains splitting of white light?
a) Reflection
b) Refraction
c) Dispersion
d) Diffraction
Answer: c - Which wave requires medium?
a) Light
b) Radio
c) Sound
d) X-rays
Answer: c - Which quantity is vector?
a) Speed
b) Distance
c) Velocity
d) Time
Answer: c - Unit of electric power:
a) Joule
b) Watt
c) Volt
d) Ampere
Answer: b - Which law explains pressure-volume relation?
a) Ohm’s Law
b) Boyle’s Law
c) Newton’s Law
d) Hooke’s Law
Answer: b - Which metal is best conductor?
a) Iron
b) Copper
c) Silver
d) Aluminium
Answer: c - Which element is non-metal?
a) Iron
b) Copper
c) Oxygen
d) Aluminium
Answer: c - Which acid present in curd?
a) Citric acid
b) Lactic acid
c) Acetic acid
d) Sulfuric acid
Answer: b - Which gas is noble gas?
a) Oxygen
b) Nitrogen
c) Neon
d) Hydrogen
Answer: c - Which process converts solid to liquid?
a) Freezing
b) Melting
c) Sublimation
d) Condensation
Answer: b - Which tissue transports food in plants?
a) Xylem
b) Phloem
c) Root
d) Leaf
Answer: b - Which organ controls involuntary actions?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Spinal cord
Answer: c - Which blood group is universal donor?
a) A
b) B
c) AB
d) O
Answer: d - Which vitamin helps immunity?
a) A
b) B
c) C
d) D
Answer: c - Which organ helps digestion?
a) Lung
b) Heart
c) Stomach
d) Brain
Answer: c - Which gas is released in respiration?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which ecosystem is largest?
a) Forest
b) Desert
c) Ocean
d) Grassland
Answer: c - Which gas causes global warming?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which is renewable resource?
a) Coal
b) Petrol
c) Solar
d) Diesel
Answer: c - Which force acts between Earth and objects?
a) Magnetic
b) Electric
c) Gravitational
d) Friction
Answer: c - Which unit measures energy?
a) Joule
b) Watt
c) Volt
d) Ampere
Answer: a - Which energy is due to motion?
a) Potential
b) Kinetic
c) Heat
d) Chemical
Answer: b - Which scientist discovered neutron?
a) Dalton
b) Thomson
c) Chadwick
d) Rutherford
Answer: c - Which particle has positive charge?
a) Proton
b) Electron
c) Neutron
d) Ion
Answer: a - Which metal is least reactive?
a) Sodium
b) Gold
c) Calcium
d) Iron
Answer: b - Which gas used in photosynthesis?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which part of eye controls light?
a) Retina
b) Iris
c) Cornea
d) Lens
Answer: b - Which vitamin helps vision?
a) A
b) B
c) C
d) D
Answer: a - Which disease caused by bacteria?
a) COVID-19
b) TB
c) Dengue
d) Flu
Answer: b - Which organ filters blood?
a) Liver
b) Kidney
c) Heart
d) Lung
Answer: b - Which process forms clouds?
a) Evaporation
b) Condensation
c) Precipitation
d) Sublimation
Answer: b - Which gas supports combustion?
a) CO2
b) O2
c) N2
d) H2
Answer: b - Which is SI unit of work?
a) Watt
b) Joule
c) Volt
d) Ampere
Answer: b - Which device converts mechanical to electrical energy?
a) Motor
b) Generator
c) Transformer
d) Battery
Answer: b - Which gas used in balloons?
a) Oxygen
b) Nitrogen
c) Helium
d) CO2
Answer: c - Which planet is nearest to Sun?
a) Venus
b) Earth
c) Mercury
d) Mars
Answer: c - Which is largest planet?
a) Earth
b) Mars
c) Jupiter
d) Venus
Answer: c - Which is red planet?
a) Earth
b) Mars
c) Venus
d) Saturn
Answer: b - Which gas most abundant in air?
a) Oxygen
b) Nitrogen
c) CO2
d) Hydrogen
Answer: b - Which layer has weather changes?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: a - Which instrument measures humidity?
a) Barometer
b) Thermometer
c) Hygrometer
d) Anemometer
Answer: c - Which is biodegradable?
a) Plastic
b) Glass
c) Paper
d) Metal
Answer: c - Which gas used in fire extinguisher?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which organ pumps blood?
a) Brain
b) Lung
c) Heart
d) Kidney
Answer: c - Which is unit of resistance?
a) Volt
b) Ampere
c) Ohm
d) Watt
Answer: c - Which process releases energy?
a) Photosynthesis
b) Respiration
c) Transpiration
d) Digestion
Answer: b - Which is basic unit of life?
a) Atom
b) Cell
c) Tissue
d) Organ
Answer: b - Which vitamin deficiency causes scurvy?
a) A
b) B
c) C
d) D
Answer: c - Which energy source is renewable?
a) Coal
b) Petrol
c) Solar
d) Diesel
Answer: c - Which organ removes waste?
a) Kidney
b) Heart
c) Brain
d) Lung
Answer: a
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