Natural Science MCQs (201–250) – Page 5
Advanced & Exam-Level MCQs
- Which phenomenon causes bending of light?
a) Reflection
b) Refraction
c) Diffraction
d) Interference
Answer: b - Which law states “for every action there is equal and opposite reaction”?
a) Newton’s 1st
b) Newton’s 2nd
c) Newton’s 3rd
d) Ohm’s Law
Answer: c - Which is vector quantity?
a) Speed
b) Distance
c) Velocity
d) Time
Answer: c - Which particle has negative charge?
a) Proton
b) Neutron
c) Electron
d) Atom
Answer: c - Which element is most electronegative?
a) Oxygen
b) Nitrogen
c) Fluorine
d) Chlorine
Answer: c - Which acid is in vinegar?
a) Citric
b) Acetic
c) Lactic
d) Sulfuric
Answer: b - Which gas is used in respiration?
a) CO2
b) O2
c) N2
d) H2
Answer: b - Which organ secretes insulin?
a) Liver
b) Pancreas
c) Kidney
d) Heart
Answer: b - Which blood cells carry oxygen?
a) WBC
b) RBC
c) Platelets
d) Plasma
Answer: b - Which organ stores bile?
a) Liver
b) Gall bladder
c) Kidney
d) Heart
Answer: b - Which layer of Earth has life?
a) Lithosphere
b) Hydrosphere
c) Biosphere
d) Atmosphere
Answer: c - Which is renewable resource?
a) Coal
b) Petroleum
c) Solar
d) Natural gas
Answer: c - Which gas causes greenhouse effect?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which energy stored in battery?
a) Electrical
b) Chemical
c) Heat
d) Light
Answer: b - Which device converts electrical to mechanical?
a) Generator
b) Motor
c) Transformer
d) Battery
Answer: b - Which metal used in thermometers?
a) Iron
b) Mercury
c) Copper
d) Silver
Answer: b - Which part of eye forms image?
a) Cornea
b) Retina
c) Iris
d) Lens
Answer: b - Which vitamin deficiency causes night blindness?
a) A
b) B
c) C
d) D
Answer: a - Which disease spreads by mosquito?
a) TB
b) Malaria
c) Cancer
d) Diabetes
Answer: b - Which gas used in photosynthesis?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which force pulls objects toward Earth?
a) Friction
b) Gravity
c) Magnetic
d) Electric
Answer: b - Which unit measures electric current?
a) Volt
b) Ampere
c) Ohm
d) Watt
Answer: b - Which is SI unit of power?
a) Joule
b) Watt
c) Volt
d) Ampere
Answer: b - Which scientist discovered penicillin?
a) Newton
b) Fleming
c) Darwin
d) Einstein
Answer: b - Which organ removes waste?
a) Liver
b) Kidney
c) Heart
d) Brain
Answer: b - Which gas is inert?
a) Oxygen
b) Nitrogen
c) Helium
d) CO2
Answer: c - Which is strongest acid?
a) HCl
b) H2SO4
c) CH3COOH
d) HNO3
Answer: b - Which element is metal?
a) Oxygen
b) Nitrogen
c) Sodium
d) Carbon
Answer: c - Which part controls reflex action?
a) Brain
b) Spinal cord
c) Heart
d) Lung
Answer: b - Which blood group is universal receiver?
a) O
b) A
c) B
d) AB
Answer: d - Which vitamin helps bones?
a) A
b) B
c) C
d) D
Answer: d - Which process releases CO2?
a) Photosynthesis
b) Respiration
c) Transpiration
d) Digestion
Answer: b - Which layer closest to Earth?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: a - Which planet closest to Sun?
a) Venus
b) Earth
c) Mercury
d) Mars
Answer: c - Which is largest ocean?
a) Atlantic
b) Indian
c) Pacific
d) Arctic
Answer: c - Which metal used in electric wires?
a) Iron
b) Copper
c) Zinc
d) Lead
Answer: b - Which energy from moving wind?
a) Solar
b) Wind
c) Heat
d) Chemical
Answer: b - Which is biodegradable?
a) Plastic
b) Metal
c) Paper
d) Glass
Answer: c - Which gas used in fire extinguisher?
a) O2
b) CO2
c) N2
d) H2
Answer: b - Which instrument measures wind speed?
a) Thermometer
b) Barometer
c) Hygrometer
d) Anemometer
Answer: d - Which scientist gave relativity?
a) Newton
b) Einstein
c) Galileo
d) Faraday
Answer: b - Which device stores energy?
a) Battery
b) Bulb
c) Switch
d) Wire
Answer: a - Which is unit of resistance?
a) Volt
b) Ampere
c) Ohm
d) Watt
Answer: c - Which gas supports life?
a) CO2
b) O2
c) N2
d) H2
Answer: b - Which process forms rain?
a) Evaporation
b) Condensation
c) Precipitation
d) Sublimation
Answer: c - Which is clean energy?
a) Coal
b) Petrol
c) Solar
d) Diesel
Answer: c - Which is basic unit of life?
a) Atom
b) Cell
c) Tissue
d) Organ
Answer: b - Which organ pumps blood?
a) Brain
b) Heart
c) Kidney
d) Lung
Answer: b - Which gas released by plants?
a) CO2
b) O2
c) N2
d) H2
Answer: b
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