100+ Science GK Questions with Answers on Everyday Science

GK Questions with Answers on Everyday Science: Science is an important part of our daily life, and understanding it makes learning more interesting. This section on science gk questions and science related gk questions helps students to improve their general knowledge and logical thinking. By solving these science gk question everyday, students can stay updated with practical concepts of chemistry, physics and biology that we use in real life.

These gk science questions are designed in a simple way so that even beginners can understand the basic idea behind them. The science gk questions with answers also help in preparing for school CBSE exams, competitive test and quizzes. Many government exams like SSC, Railways and even state level exams ask gk questions science to test the awareness level of candidates.

In today’s time, knowing science is not only for scientists, but for every student who wants to know how things work around us. So, this collection of science related gk questions aims to make learning fun, easy, and useful for everyone.

Best 100 Science GK Questions with Answers Quiz to Test Your Knowledge

Ques: Which planet is known as the “Red Planet”?

A) Mars

B) Venus

C) Jupiter

D) Saturn

Answer: A) Mars

Ques: What gas do plants absorb from the atmosphere?

A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) Hydrogen

Answer: C) Carbon dioxide

Ques: Who is known as the “Father of Biology”?

A) Newton

B) Aristotle

C) Einstein

D) Darwin

Answer: B) Aristotle

Ques: Which part of the plant conducts photosynthesis?

A) Flower

B) Leaf

C) Root

D) Stem

Answer: B) Leaf

Ques: What is the boiling point of water at sea level in Celsius?

A) 90°C

B) 100°C

C) 110°C

D) 80°C

Answer: B) 100°C

Ques: The hardest natural substance on Earth is:

A) Iron

B) Diamond

C) Gold

D) Silver

Answer: B) Diamond

Ques: What organ pumps blood throughout the human body?

A) Liver

B) Brain

C) Heart

D) Kidney

Answer: C) Heart

Ques: Which scientist discovered gravity after watching an apple fall?

A) Galileo

B) Newton

C) Darwin

D) Faraday

Answer: B) Newton

Ques: The process by which plants prepare their food is known as:

A) Respiration

B) Transpiration

C) Photosynthesis

D) Germination

Answer: C) Photosynthesis

Ques: What is the chemical symbol for gold?

A) Ag

B) Au

C) Ga

D) Gd

Answer: B) Au

Ques: Which vitamin is produced when the skin is exposed to sunlight?

A) Vitamin A

B) Vitamin D

C) Vitamin C

D) Vitamin B12

Answer: B) Vitamin D

Ques: The largest organ in the human body is:

A) Brain

B) Liver

C) Skin

D) Lungs

Answer: C) Skin

Ques: Which animal is known as the King of the Jungle?

A) Tiger

B) Lion

C) Elephant

D) Leopard

Answer: B) Lion

Ques: Which organ in human body is mainly responsible for detoxification?

A) Heart

B) Kidney

C) Liver

D) Lungs

Answer: C) Liver

Ques: Which gas is most abundant in the Earth's atmosphere?

A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) Argon

Answer: B) Nitrogen

Ques: What is used to measure atmospheric pressure?

A) Thermometer

B) Barometer

C) Lactometer

D) Altimeter

Answer: B) Barometer

Ques: The process of conversion of water vapor into water is called:

A) Evaporation

B) Condensation

C) Precipitation

D) Sublimation

Answer: B) Condensation

Ques: Which is the smallest unit of life?

A) Molecule

B) Organ

C) Cell

D) Tissue

Answer: C) Cell

Ques: How many bones are there in an adult human body?

A) 205

B) 206

C) 210

D) 201

Answer: B) 206

Ques: Name the gas filled in electric bulbs.

A) Hydrogen

B) Nitrogen

C) Helium

D) Oxygen

Answer: B) Nitrogen

Ques: Which instrument is used to measure temperature?

A) Hydrometer

B) Barometer

C) Thermometer

D) Anemometer

Answer: C) Thermometer

Ques: Which acid is found in lemon?

A) Acetic acid

B) Citric acid

C) Benzoic acid

D) Lactic acid

Answer: B) Citric acid

Ques: What organ produces insulin?

A) Kidney

B) Liver

C) Pancreas

D) Thyroid

Answer: C) Pancreas

Ques: Which of the following is not a metal?

A) Iron

B) Gold

C) Carbon

D) Copper

Answer: C) Carbon

Ques: Which healthcare professional studies X-rays?

A) Cardiologist

B) Radiologist

C) Neurologist

D) Dentist

Answer: B) Radiologist

Ques: The nearest star to Earth is:

A) Sirius

B) Proxima Centauri

C) Alpha Centauri

D) The Sun

Answer: D) The Sun

Ques: What is the science of the study of weather called?

A) Geology

B) Meteorology

C) Astrology

D) Astronomy

Answer: B) Meteorology

Ques: Which part of the eye controls the amount of light entering?

A) Retina

B) Iris

C) Lens

D) Cornea

Answer: B) Iris

Ques: Which chemical is used for the purification of drinking water?

A) Chlorine

B) Nitrogen

C) Oxygen

D) Helium

Answer: A) Chlorine

Ques: What is the SI unit of force?

A) Watt

B) Newton

C) Joule

D) Pascal

Answer: B) Newton

Ques: Heaviest animal on Earth is:

A) Elephant

B) Blue Whale

C) Rhinoceros

D) Giraffe

Answer: B) Blue Whale

Ques: Which process turns sugar into alcohol?

A) Fermentation

B) Distillation

C) Evaporation

D) Sublimation

Answer: A) Fermentation

Ques: Which metal is liquid at room temperature?

A) Mercury

B) Lead

C) Sodium

D) Copper

Answer: A) Mercury

Ques: The branch of science dealing with the study of fungi is:

A) Entomology

B) Mycology

C) Geology

D) Botany

Answer: B) Mycology

Ques: How many pairs of chromosomes are there in a human body?

A) 20

B) 23

C) 24

D) 22

Answer: B) 23

Ques: Which organ is affected by Tuberculosis?

A) Lungs

B) Stomach

C) Heart

D) Liver

Answer: A) Lungs

Ques: What is the main gas responsible for greenhouse effect?

A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) Hydrogen

Answer: C) Carbon dioxide

Ques: Which gland in the human body is known as the "master gland"?

A) Thyroid

B) Pituitary

C) Adrenal

D) Pancreas

Answer: B) Pituitary

Ques: What is the most common type of star in the Milky Way?

A) Red Giant

B) Red Dwarf

C) Blue Giant

D) White Dwarf

Answer: B) Red Dwarf

Ques: Who discovered Penicillin?

A) Fleming

B) Pasteur

C) Curie

D) Newton

Answer: A) Fleming

Ques: What instrument is used to measure humidity?

A) Thermometer

B) Hygrometer

C) Barometer

D) Altimeter

Answer: B) Hygrometer

Ques: The most common type of plant tissue is:

A) Parenchyma

B) Collenchyma

C) Sclerenchyma

D) Meristem

Answer: A) Parenchyma

Ques: What is the scientific name of the human being?

A) Homo erectus

B) Homo sapiens

C) Homo habilis

D) Homo neanderthalensis

Answer: B) Homo sapiens

Ques: Who invented the telephone?

A) Thomas Edison

B) Alexander Graham Bell

C) James Watt

D) Nikola Tesla

Answer: B) Alexander Graham Bell

Ques: Which vitamin is mainly found in carrots?

A) Vitamin B

B) Vitamin A

C) Vitamin C

D) Vitamin D

Answer: B) Vitamin A

Ques: What is the primary function of red blood cells?

A) Carry oxygen

B) Fight infection

C) Control body temperature

D) Produce hormones

Answer: A) Carry oxygen

Ques: What is the main ingredient in glass?

A) Soda

B) Silica

C) Lime

D) Alum

Answer: B) Silica

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Ques: Which gas is commonly used in balloons?

A) Oxygen

B) Nitrogen

C) Helium

D) Argon

Answer: C) Helium

Ques: Which part of the brain controls balance?

A) Cerebrum

B) Cerebellum

C) Medulla

D) Thalamus

Answer: B) Cerebellum

Ques: The primary source of energy for the Earth is:

A) Wind

B) Water

C) Sun

D) Coal

Answer: C) Sun

(…and 50 more questions continue in the same MCQ format for full coverage…)

Ques: Which organ in human body filters blood?

A) Heart

B) Lungs

C) Kidney

D) Liver

Answer: C) Kidney

Ques: What is the path of blood circulation in the human body called?

A) Kindey loop

B) Circulatory system

C) Respiratory system

D) Digestive system

Answer: B) Circulatory system

Ques: The metallic conductor in the filament of an electric bulb is:

A) Copper

B) Silver

C) Tungsten

D) Aluminium

Answer: C) Tungsten

Ques: What is the process by which solid changes directly into gas?

A) Evaporation

B) Sublimation

C) Distillation

D) Melting

Answer: B) Sublimation

Ques: The study of birds is called:

A) Ornithology

B) Pedology

C) Ichthyology

D) Entomology

Answer: A) Ornithology

Ques: Deuterium is an isotope of:

A) Nitrogen

B) Oxygen

C) Hydrogen

D) Phosphorus

Answer: C) Hydrogen

Ques: Which is the most important ore of aluminium?

A) Hematite

B) Bauxite

C) Galena

D) Magnetite

Answer: B) Bauxite

Ques: Which gas is used for the ripening of fruits?

A) Oxygen

B) Carbon dioxide

C) Ethylene

D) Hydrogen

Answer: C) Ethylene

Ques: The SI unit of electric current is:

A) Volt

B) Coulomb

C) Ohm

D) Ampere

Answer: D) Ampere

Ques: Which planet is closest to the Sun?

A) Earth

B) Venus

C) Mercury

D) Mars

Answer: C) Mercury

Ques: The study of earthquakes is called:

A) Seismology

B) Vulcanology

C) Geology

D) Ecology

Answer: A) Seismology

Ques: Vaccines are used to produce:

A) Vitamins

B) Immunity

C) Strength

D) Proteins

Answer: B) Immunity

Ques: The largest internal organ in human body is:

A) Brain

B) Kidney

C) Liver

D) Heart

Answer: C) Liver

Ques: Which gas is known as “laughing gas”?

A) Nitric oxide

B) Nitrous oxide

C) Nitrogen dioxide

D) Nitric acid

Answer: B) Nitrous oxide

Ques: What type of energy transformation occurs in photosynthesis?

A) Thermal to chemical

B) Light to chemical

C) Electrical to thermal

D) Chemical to electrical

Answer: B) Light to chemical

Ques: Chlorophyll mainly contains:

A) Iron

B) Copper

C) Magnesium

D) Calcium

Answer: C) Magnesium

Ques: Which element is necessary for making nuclear energy in nuclear reactors?

A) Uranium

B) Carbon

C) Hydrogen

D) Oxygen

Answer: A) Uranium

Ques: The scientist who discovered the law of flotation:

A) Archimedes

B) Newton

C) Faraday

D) Pascal

Answer: A) Archimedes

Ques: The first man on moon was:

A) Yuri Gagarin

B) Neil Armstrong

C) Buzz Aldrin

D) Michael Collins

Answer: B) Neil Armstrong

Ques: What is the main function of white blood cells?

A) Transport oxygen

B) Fight infection

C) Store energy

D) Clot blood

Answer: B) Fight infection

Ques: The study of the structure of tissues is called:

A) Cytology

B) Histology

C) Karyology

D) Urology

Answer: B) Histology

Ques: Acid present in vinegar is:

A) Lactic acid

B) Acetic acid

C) Citric acid

D) Sulphuric acid

Answer: B) Acetic acid

Ques: The largest bone in human body:

A) Humerus

B) Femur

C) Tibia

D) Ulna

Answer: B) Femur

Ques: Lens used to correct presbyopia:

A) Concave

B) Convex

C) Bifocal

D) Cylindrical

Answer: C) Bifocal

Ques: The process by which plants lose water vapor is:

A) Perspiration

B) Transpiration

C) Respiration

D) Evaporation

Answer: B) Transpiration

Ques: What is the chemical formula for common salt?

A) NaCl

B) KCl

C) CaCO3

D) NaHCO3

Answer: A) NaCl

Ques: Name the scientist who developed the theory of relativity:

A) Maxwell

B) Einstein

C) Rutherford

D) Planck

Answer: B) Einstein

Ques: Which planet has the most moons?

A) Saturn

B) Jupiter

C) Uranus

D) Neptune

Answer: A) Saturn

Ques: What is the study of insects called?

A) Ornithology

B) Entomology

C) Zoology

D) Botany

Answer: B) Entomology

Ques: What is the main constituent of the sun?

A) Oxygen

B) Hydrogen

C) Carbon

D) Nitrogen

Answer: B) Hydrogen

Ques: The most suitable conductor of electricity is:

A) Silver

B) Copper

C) Aluminium

D) Iron

Answer: A) Silver

Ques: The deficiency of which vitamin causes rickets?

A) Vitamin A

B) Vitamin C

C) Vitamin D

D) Vitamin K

Answer: C) Vitamin D

Ques: Science dealing with heredity and variation:

A) Genetics

B) Cytology

C) Ecology

D) Zoology

Answer: A) Genetics

Ques: The ozone layer protects us mainly from:

A) Microwaves

B) Ultraviolet rays

C) Infrared rays

D) X-rays

Answer: B) Ultraviolet rays

Ques: What is the main pigment in human skin?

A) Melanin

B) Chlorophyll

C) Hemoglobin

D) Keratin

Answer: A) Melanin

Ques: In the periodic table, elements are arranged in order of:

A) Mass number

B) Atomic number

C) Alphabet

D) Density

Answer: B) Atomic number

Ques: What is the normal pH value of blood?

A) 5.5

B) 6.5

C) 7.4

D) 8.0

Answer: C) 7.4

Ques: Scurvy is caused due to deficiency of:

A) Vitamin A

B) Vitamin B

C) Vitamin C

D) Vitamin D

Answer: C) Vitamin C

Ques: The boiling point of water in Kelvin is:

A) 100

B) 212

C) 373

D) 273

Answer: C) 373

Ques: The lightest gas is:

A) Oxygen

B) Hydrogen

C) Nitrogen

D) Helium

Answer: B) Hydrogen

Ques: Cyanobacteria are also known as:

A) Blue-green algae

B) Fungi

C) Moss

D) Fern

Answer: A) Blue-green algae

Ques: What happens during rusting of iron?

A) Oxidation

B) Reduction

C) Sublimation

D) Decay

Answer: A) Oxidation

Ques: The primary function of the ozone layer is to:

A) Absorb UV rays

B) Produce oxygen

C) Cause rain

D) Heat the Earth

Answer: A) Absorb UV rays

Ques: The scientific name of modern man is:

A) Homo erectus

B) Homo sapiens

C) Homo habilis

D) Australopithecus

Answer: B) Homo sapiens

Ques: SST is used to study:

A) Weather

B) Soil

C) Temperature of sea surface

D) Trees

Answer: C) Temperature of sea surface

Ques: Who is regarded as the father of computers?

A) Bill Gates

B) Charles Babbage

C) Alan Turing

D) Steve Jobs

Answer: B) Charles Babbage

Ques: Which of the following is not an electromagnetic wave?

A) Light

B) Heat

C) Sound

D) X-rays

Answer: C) Sound

Ques: The SI unit of electric power is:

A) Watt

B) Joule

C) Volt

D) Ohm

Answer: A) Watt

Ques: What kind of energy is possessed by a moving body?

A) Potential

B) Kinetic

C) Thermal

D) Electrical

Answer: B) Kinetic

Ques: In which organelle does photosynthesis occur?

A) Mitochondria

B) Chloroplast

C) Ribosome

D) Nucleus

Answer: B) Chloroplast