50 Science GK Questions with Answers on Everyday Science

Science is all around us, from the food we eat to the air we breathe, science plays a big role in our daily lives. Learning about science not only helps us understand how things work but also makes us smarter and more curious about the world.

In this article, we have put together a wide range of Science GK Questions with answers to boost your learning. These science general knowledge questions are designed to test your basics and help you discover fun facts about physics, chemistry, biology, space, and more.

Whether you're looking for GK science questions to prepare for competitive exams or just want to improve your understanding, this list of science GK questions with answers in English will be extremely helpful. It includes some of the most frequently asked GK questions about science in quizzes and school assessments.

We’ve also included a downloadable science GK questions with answers PDF so you can study anytime, anywhere. If you're someone who enjoys trivia, don’t miss out on our 100 science quiz questions with answers perfect for revising quickly or hosting your own quiz competition.

This curated set of science GK questions in English is ideal for school students, quiz enthusiasts, and anyone who wants to strengthen their general science knowledge. Let’s explore the wonders of science together with these exciting and informative science GK questions.

Best 100 Science Quiz Questions with Answers

Question: Which planet is known as the “Evening Star” or “Morning Star” due to its visibility?

1. Venus
2. Mercury
3. Mars
4. Jupiter

Answer: a) Venus

Question: What is the main gas in the Earth’s stratosphere that absorbs and blocks harmful UV radiation?

1. Oxygen
2. Carbon dioxide
3. Nitrogen
4. Ozone

Answer: d) Ozone

Question: Who is credited with the discovery of the laws of motion and universal gravitation?

1. Galileo Galilei
2. Johannes Kepler
3. Isaac Newton
4. Albert Einstein

Answer: c) Isaac Newton

Question: Which gas is commonly used in car tires to inflate them?

1. Oxygen
2. Nitrogen
3. Helium
4. Carbon dioxide

Answer: b) Nitrogen

Question: What is the chemical symbol for silver?

1. Si
2. Sr
3. Ag
4. Al

Answer: c) Ag

Question: What is the process by which liquid water turns into ice?

1. Vaporization
2. Condensation
3. Melting
4. Freezing

Answer: d) Freezing

Question: Which gas is most abundant in the Earth’s atmosphere?

1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Hydrogen

Answer: a) Nitrogen

Question: What is the chemical symbol for gold?

1. Go
2. Gl
3. Gd
4. Au

Answer: d) Au

Question: What is the process by which plants make their food using sunlight?

1. Photosynthesis
2. Respiration
3. Fermentation
4. Transpiration

Answer: a) Photosynthesis

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

1. Venus
2. Mars
3. Jupiter
4. Saturn

Answer: b) Mars

Question: What is the chemical formula for water?

1. H2O2
2. CO2
3. H2O
4. O2H

Answer: c) H2O

Question: The pH scale measures the acidity or alkalinity of a substance. What does a pH of 7 indicate?

1. Neutral
2. Acidic
3. Alkaline
4. Basic

Answer: a) Neutral

Question: Who is known as the father of modern physics and developed the theory of relativity?

1. Isaac Newton
2. Galileo Galilei
3. Albert Einstein
4. Stephen Hawking

Answer: c) Albert Einstein

Question: Which gas do plants absorb from the atmosphere during photosynthesis?

1. Carbon dioxide
2. Oxygen
3. Hydrogen
4. Nitrogen

Answer: a) Carbon dioxide

Question: What is the chemical symbol for iron?

1. Ir
2. Io
3. Fe
4. Fi

Answer: c) Fe

Question: Which gas is responsible for the Earth’s ozone layer depletion?

1. Oxygen
2. Nitrogen
3. Chlorofluorocarbons (CFCs)
4. Carbon dioxide

Answer: c) Chlorofluorocarbons (CFCs)

Question: What is the unit of electric current?

1. Joule
2. Volt
3. Ampere
4. Ohm

Answer: c) Ampere

Question: Which metal is the best conductor of electricity?

1. Silver
2. Copper
3. Gold
4. Aluminium

Answer: b) Copper

Question: What is the process by which plants release water vapour into the atmosphere?

1. Condensation
2. Photosynthesis
3. Transpiration
4. Respiration

Answer: c) Transpiration

Question: What is the chemical symbol for lead?

1. Li
2. Ld
3. Le
4. Pb

Answer: d) Pb

Question: Which gas do humans primarily exhale when breathing?

1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Hydrogen

Answer: a) Carbon dioxide

Question: What is the process of a liquid changing into a gas at its boiling point?

1. Sublimation
2. Evaporation
3. Condensation
4. Melting

Answer: b) Evaporation

Question: Which gas is responsible for the greenhouse effect and global warming?

1. Oxygen
2. Nitrogen
3. Carbon dioxide
4. Hydrogen

Answer: c) Carbon dioxide

Question: What is the chemical symbol for potassium?

1. Po
2. Pt
3. K
4. Ka

Answer: c) K

Question: Which metal is commonly used for making aircraft and aerospace components due to its low density?

1. Iron
2. Copper
3. Aluminium
4. Silver

Answer: c) Aluminium

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Question: What is the chemical formula for methane, the primary component of natural gas?

1. CH3
2. CO
3. CH4
4. H2O

Answer: c) CH4

Question: In the electromagnetic spectrum, which colour of light has the highest frequency?

1. Red
2. Blue
3. Green
4. Violet

Answer: d) Violet

Question: What is the process of water droplets forming on a cold surface due to condensation in the air?

1. Dew
2. Frost
3. Hail
4. Rain

Answer: a) Dew

Question: What is the chemical symbol for carbon?

1. Co
2. Cb
3. Cr
4. C

Answer: d) C

Question: Which gas is essential for respiration and is inhaled by humans during breathing?

1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Hydrogen

Answer: b) Oxygen

Question: What is the unit of force in the International System of Units (SI)?

1. Watt
2. Newton
3. Volt
4. Ampere

Answer: b) Newton

Question: Which metal is used to make permanent magnets?

1. Gold
2. Iron
3. Aluminium
4. Nickel

Answer: b) Iron

Question: What is the chemical symbol for mercury, a liquid metal at room temperature?

1. Me
2. Mg
3. Hg
4. Mr

Answer: c) Hg

Question: In which part of the human body is the smallest bone found?

1. Arm
2. Leg
3. Ear
4. Nose

Answer: c) Ear

Question: Which gas is produced during the process of fermentation?

1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Nitrogen

Answer: b) Carbon dioxide

Question: What is the chemical symbol for sodium?

1. So
2. Sd
3. Na
4. Ne

Answer: c) Na

Question: What is the process by which an object appears to be lifted or pushed up when placed in a fluid?

1. Buoyancy
2. Gravity
3. Inertia
4. Friction

Answer: a) Buoyancy

Question: Which gas is used in fire extinguishers to suppress fires by displacing oxygen?

1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Hydrogen

Answer: a) Carbon dioxide

Question: What is the chemical formula for table salt (sodium chloride)?

1. NaCl
2. H2O
3. CO2
4. K2SO4

Answer: a) NaCl

Question: Which gas is used for inflating balloons and makes your voice sound squeaky when inhaled?

1. Oxygen
2. Carbon dioxide
3. Helium
4. Nitrogen

Answer: c) Helium

Question: What is the chemical symbol for neon, a noble gas commonly used in neon signs?

1. No
2. Ne
3. Na
4. Ni

Answer: b) Ne

Question: In which state of matter do particles have the most kinetic energy and move freely?

1. Solid
2. Liquid
3. Gas
4. Plasma

Answer: c) Gas

Question: What is the unit of energy in the International System of Units (SI)?

1. Joule
2. Watt
3. Volt
4. Ampere

Answer: a) Joule

Question: What is the chemical symbol for copper?

1. Cu
2. Cp
3. Cr
4. Co

Answer: a) Cu

Question: Which gas is responsible for the distinctive smell of rotten eggs?

1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Hydrogen sulphide

Answer: d) Hydrogen sulphide

Question: What is the process by which water droplets combine to form larger droplets and fall as precipitation?

1. Evaporation
2. Sublimation
3. Condensation
4. Coalescence

Answer: d) Coalescence

Question: What is the chemical symbol for helium, a gas known for its use in balloons and airships?

1. H
2. He
3. Hy
4. Ha

Answer: b) He

Question: Which gas is used in the treatment of respiratory conditions and is commonly inhaled for medical purposes?

1. Oxygen
2. Carbon dioxide
3. Nitrogen
4. Nitrous oxide

Answer: d) Nitrous oxide

Question: In which part of the human body are the vocal cords located?

1. Lungs
2. Brain
3. Throat
4. Heart

Answer: c) Throat

Question: What is the chemical symbol for silicon, a key component in the electronics industry?

1. Si
2. So
3. Se
4. Sl

Answer: a) Si