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By Ankit Gupta
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Updated on 22 Aug 2025, 12:22 IST
Chemistry is one of the most important branches of science that we study in school and use in daily life. From the air we breathe to the food we eat, chemistry is everywhere. For students, exam aspirants, and quiz lovers, chemistry GK questions are a great way to test knowledge and revise key concepts. That is why collections like 50 Chemistry GK Questions and Answers are very useful. They cover the basics of chemistry in a simple way and help in learning quickly.
These questions usually focus on elements, compounds, atomic structure, periodic table, acids and bases, and practical uses of chemistry. With the help of chemistry GK questions in English, even students who study in English medium schools or prepare for national-level exams can easily practice and improve their knowledge.
If you are preparing for a quiz or exam, then practicing chemistry quiz questions and answers regularly is the best strategy. Unlike long theory, these short and direct questions help you remember facts faster. For example, knowing “Which gas is used in balloons?” or “Who is called the father of modern chemistry?” are typical chemistry quiz questions that often appear in general knowledge tests.
The good thing about chemistry GK is that it is not only for science students. Even people preparing for SSC, Railways, Banking, UPSC, and other exams can benefit from chemistry GK questions with answers. Since many exams include a science section, solving GK questions in chemistry makes preparation easier and boosts confidence.
A chemistry GK question can be very simple like identifying a symbol from the periodic table, or it can be slightly advanced like naming a chemical process. That is why a balanced set of chemistry general knowledge questions is always helpful.
Ques. Who is called the father of modern chemistry?
Answer: Antoine Lavoisier
Ques.What is the chemical symbol of gold?
Answer: Au
Ques.Which gas is essential for breathing?
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Answer: Oxygen (O₂)
Ques.What is the chemical formula of water?
Answer: H₂O
Ques.Which element has the atomic number 1?
Answer: Hydrogen
Ques.Which acid is found in lemon?
Answer: Citric Acid
Ques.Which is the lightest element in the periodic table?
Answer: Hydrogen
Ques.Which gas is filled in balloons?
Answer: Helium
Ques.What is the pH value of pure water?
Answer: 7 (neutral)
Ques.Which gas is known as laughing gas?
Answer: Nitrous Oxide (N₂O)
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Ques.Which element is used in pencil lead?
Answer: Carbon (Graphite)
Ques.Which metal is liquid at room temperature?
Answer: Mercury
Ques.Which element is used in making stainless steel along with iron?
Answer: Chromium
Ques.Which gas is used for photosynthesis by plants?
Answer: Carbon dioxide (CO₂)
Ques.Which is the hardest natural substance on Earth?
Answer: Diamond (Carbon)
Ques.Which gas is used in fire extinguishers?
Answer: Carbon dioxide (CO₂)
Ques.Which metal is used in making aircrafts because it is light?
Answer: Aluminium
Ques.Which non-metal is essential for life and is present in proteins?
Answer: Nitrogen
Ques.Which element is used in making thermometers?
Answer: Mercury
Ques.Which gas is used for welding?
Answer: Acetylene mixed with oxygen
Ques.Which chemical is used in common salt?
Answer: Sodium Chloride (NaCl)
Ques.Which acid is used in car batteries?
Answer: Sulphuric Acid (H₂SO₄)
Ques.Which substance is used to disinfect drinking water?
Answer: Chlorine
Ques.Which gas is used in soft drinks?
Answer: Carbon dioxide (CO₂)
Ques.Which metal is found in blood?
Answer: Iron (in hemoglobin)
Ques.Which chemical is used in photography?
Answer: Silver Bromide
Ques.Which element is used in toothpaste to prevent cavities?
Answer: Fluorine (as fluoride)
Ques.Which acid is present in vinegar?
Answer: Acetic Acid
Ques.Which chemical gives onions their strong smell?
Answer: Sulphur compounds
Ques.Which chemical is used as a preservative in pickles?
Answer: Sodium Benzoate
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Ques.Who discovered the periodic table?
Answer: Dmitri Mendeleev
Ques.Who discovered oxygen?
Answer: Joseph Priestley
Ques.Who discovered electron?
Answer: J. J. Thomson
Ques.Who proposed the atomic theory?
Answer: John Dalton
Ques.Who discovered radioactivity?
Answer: Henri Becquerel
Ques.Who is known as the father of nuclear chemistry?
Answer: Otto Hahn
Ques.Who discovered radium?
Answer: Marie Curie and Pierre Curie
Ques.Who discovered neutron?
Answer: James Chadwick
Ques.Who discovered proton?
Answer: Ernest Rutherford
Ques.Who gave the law of conservation of mass?
Answer: Antoine Lavoisier
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Ques.Which gas is used in making bread fluffy?
Answer: Carbon dioxide (CO₂)
Ques.Which chemical is used in dry cells?
Answer: Ammonium chloride
Ques.Which is the most abundant gas in the Earth’s atmosphere?
Answer: Nitrogen
Ques.Which is the most reactive element?
Answer: Fluorine
Ques.What is the main element of stainless steel?
Answer: Iron
Ques.Which element is used in matchsticks?
Answer: Phosphorus
Ques.Which metal is known as quicksilver?
Answer: Mercury
Ques.Which gas causes acid rain?
Answer: Sulphur dioxide (SO₂)
Ques.Which gas turns lime water milky?
Answer: Carbon dioxide (CO₂)
Ques.Which element is used in nuclear reactors as fuel?
Answer: Uranium
Ques.Which gas is called ozone layer protector?
Answer: Ozone (O₃)
Ques.Which element is responsible for corrosion of iron?
Answer: Oxygen + Water (Rusting process)
Ques.Which metal is used for making coins and ornaments?
Answer: Copper and Silver
Ques.Which element is called the "King of Chemicals"?
Answer: Sulphuric Acid
Ques.Which is the lightest metal?
Answer: Lithium
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Q1. What is the chemical symbol of sodium?
a) Na
b) So
c) Sd
d) Sm
Answer: a) Na
Q2. Which gas is called the ‘Greenhouse Gas’?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Argon
Answer: b) Carbon dioxide
Q3. Which acid is known as oil of vitriol?
a) Nitric Acid
b) Sulphuric Acid
c) Hydrochloric Acid
d) Acetic Acid
Answer: b) Sulphuric Acid
Q4. Which chemical is used to make soaps?
a) Sodium hydroxide
b) Calcium carbonate
c) Potassium chloride
d) Magnesium sulphate
Answer: a) Sodium hydroxide
Q5. Which gas is known as marsh gas?
a) Ethane
b) Methane
c) Butane
d) Propane
Answer: b) Methane
Q6. Which metal is used in making filaments of bulbs?
a) Iron
b) Copper
c) Tungsten
d) Aluminium
Answer: c) Tungsten
Q7. Which gas is used in making soda water?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Helium
Answer: b) Carbon dioxide
Q8. Which vitamin is produced in the body with the help of sunlight?
a) Vitamin B
b) Vitamin C
c) Vitamin D
d) Vitamin E
Answer: c) Vitamin D
Q9. Who discovered hydrogen?
a) Cavendish
b) Rutherford
c) Dalton
d) Mendeleev
Answer: a) Cavendish
Q10. Which gas is called "King of Poisons"?
a) Oxygen
b) Nitrogen
c) Carbon monoxide
d) Carbon dioxide
Answer: c) Carbon monoxide
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Q11. What is the atomic number of oxygen?
a) 6
b) 7
c) 8
d) 10
Answer: c) 8
Q12. Which is the most abundant element in the universe?
a) Oxygen
b) Hydrogen
c) Helium
d) Carbon
Answer: b) Hydrogen
Q13. Which gas is known as "silent killer"?
a) Oxygen
b) Nitrogen
c) Carbon monoxide
d) Argon
Answer: c) Carbon monoxide
Q14. Which element is used in fireworks for bright red color?
a) Sodium
b) Strontium
c) Magnesium
d) Calcium
Answer: b) Strontium
Q15. Which element is found in chlorophyll?
a) Calcium
b) Magnesium
c) Sodium
d) Potassium
Answer: b) Magnesium
Q16. Which chemical is used to purify water?
a) Sodium chloride
b) Chlorine
c) Carbon dioxide
d) Hydrogen
Answer: b) Chlorine
Q17. Which gas is used in electric bulbs?
a) Helium
b) Neon
c) Argon
d) Oxygen
Answer: c) Argon
Q18. Who is known as the father of the periodic table?
a) Dalton
b) Mendeleev
c) Rutherford
d) Lavoisier
Answer: b) Mendeleev
Q19. Which gas do humans exhale while breathing?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Helium
Answer: b) Carbon dioxide
Q20. What is the atomic number of carbon?
a) 4
b) 6
c) 8
d) 10
Answer: b) 6
It is a collection of important chemistry-based general knowledge questions along with their answers. The set usually covers topics like elements, compounds, atomic structure, periodic table, acids & bases, daily life chemistry, and inventions in chemistry.
This set is useful for students, teachers, and competitive exam aspirants. It helps school students in science quizzes, and it is also important for exams like SSC, Railway, Banking, NDA, UPSC, and State-level tests where basic science GK is asked.
No, the 50 Chemistry GK Questions and Answers are designed in easy to moderate difficulty level. They focus more on general knowledge and practical chemistry facts rather than complex chemical equations, so that learners of all levels can understand.
The best way is to practice daily. Read 10–15 questions at a time, revise them, and then test yourself without looking at the answers. Repeated revision will help you remember facts for longer.
Yes, the 50 Chemistry GK Questions and Answers are perfect for school/college quizzes, online competitions, and interviews. Since they are straightforward and fact-based, they can be used in both academic and general knowledge contests.