chemistry general knowledge questions and answers-1

Here’s an easy Chemistry General Knowledge Questions and Answers. Each question is followed by multiple-choice options and the correct answer.

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Chemistry General Knowledge Questions and Answers

Question 1: What is the chemical symbol for gold?

A) Ag
B) Au
C) Gd
D) Go
Answer: B) Au
(Gold’s chemical symbol is Au, derived from the Latin word “Aurum.”)

Question 2: Which gas is most abundant in the Earth’s atmosphere?

A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Argon
Answer: C) Nitrogen
(Nitrogen makes up about 78% of the Earth’s atmosphere.)

Question 3: What is the pH value of pure water?

A) 5
B) 7
C) 10
D) 14
Answer: B) 7
(Pure water is neutral, with a pH of 7.)

Chemistry General Knowledge Questions and Answers

Question 4: Which element is known as the “lightest metal”?

A) Lithium
B) Aluminum
C) Sodium
D) Magnesium
Answer: A) Lithium
(Lithium is the lightest metal with an atomic number of 3.)

Chemistry General Knowledge Questions and Answers

Question 5: What is the main component of natural gas?

A) Methane
B) Ethane
C) Propane
D) Butane
Answer: A) Methane
(Natural gas is primarily composed of methane, CH₄.)

Question 6: Which scientist is known as the “Father of Modern Chemistry”?

A) Isaac Newton
B) Marie Curie
C) Antoine Lavoisier
D) Dmitri Mendeleev
Answer: C) Antoine Lavoisier
(Antoine Lavoisier is considered the Father of Modern Chemistry for his contributions to the field.)

Chemistry General Knowledge Questions and Answers

Question 7: What is the chemical formula for table salt?

A) NaCl
B) H₂O
C) CO₂
D) HCl
Answer: A) NaCl
(Table salt is sodium chloride, with the chemical formula NaCl.)

Question 8: Which element has the highest electronegativity?

A) Fluorine
B) Oxygen
C) Chlorine
D) Nitrogen
Answer: A) Fluorine
(Fluorine has the highest electronegativity value of 4.0 on the Pauling scale.)

Chemistry General Knowledge Questions and Answers

Question 9: What is the atomic number of carbon?

A) 6
B) 12
C) 14
D) 16
Answer: A) 6
(Carbon has an atomic number of 6, meaning it has 6 protons.)

Chemistry General Knowledge Questions and Answers

Question 10: Which gas is responsible for the “fizz” in soda?

A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Hydrogen
Answer: B) Carbon Dioxide
(Carbon dioxide (CO₂) is the gas that creates the fizz in soda.)

Question 11: What is the chemical formula for water?

A) H₂O
B) CO₂
C) NaCl
D) O₂
Answer: A) H₂O
(Water is composed of two hydrogen atoms and one oxygen atom.)

Question 12: Which element is liquid at room temperature?

A) Mercury
B) Bromine
C) Sodium
D) Iron
Answer: A) Mercury
(Mercury is the only metal that is liquid at room temperature.)

Question 13: What is the smallest unit of an element that retains its properties?

A) Molecule
B) Atom
C) Ion
D) Compound
Answer: B) Atom
(An atom is the smallest unit of an element that retains its chemical properties.)

Question 14: Which gas is used in balloons to make them float?

A) Oxygen
B) Hydrogen
C) Helium
D) Nitrogen
Answer: C) Helium
(Helium is lighter than air, making it ideal for floating balloons.)

Question 15: What is the chemical symbol for potassium?

A) P
B) K
C) Pt
D) Po
Answer: B) K
(Potassium’s symbol is K, derived from the Latin word “Kalium.”)

Question 16: Which acid is found in vinegar?

A) Hydrochloric acid
B) Sulfuric acid
C) Acetic acid
D) Nitric acid
Answer: C) Acetic acid
(Vinegar contains acetic acid, which gives it its sour taste.)

Question 17: What is the hardest natural substance on Earth?

A) Gold
B) Diamond
C) Graphite
D) Quartz
Answer: B) Diamond
(Diamond is the hardest natural substance due to its strong carbon lattice structure.)

Question 18: Which element is essential for human bones and teeth?

A) Iron
B) Calcium
C) Sodium
D) Potassium
Answer: B) Calcium
(Calcium is crucial for the formation and maintenance of bones and teeth.)

Question 19: What is the chemical formula for ozone?

A) O₂
B) O₃
C) CO₂
D) H₂O
Answer: B) O₃
(Ozone is a molecule made up of three oxygen atoms.)

Question 20: Which gas is known as “laughing gas”?

A) Oxygen
B) Carbon Dioxide
C) Nitrous Oxide
D) Methane
Answer: C) Nitrous Oxide
(Nitrous oxide, N₂O, is commonly known as laughing gas.)

Question 21: What is the chemical symbol for iron?

A) Ir
B) Fe
C) In
D) Fi
Answer: B) Fe
(Iron’s symbol is Fe, derived from the Latin word “Ferrum.”)

Question 22: Which element is used in fluorescent lights?

A) Neon
B) Argon
C) Mercury
D) Krypton
Answer: C) Mercury
(Mercury vapor is used in fluorescent lights to produce ultraviolet light.)

Question 23: What is the chemical formula for glucose?

A) C₆H₁₂O₆
B) C₁₂H₂₂O₁₁
C) CO₂
D) H₂O
Answer: A) C₆H₁₂O₆
(Glucose is a simple sugar with the formula C₆H₁₂O₆.)

Question 24: Which gas is produced during photosynthesis?

A) Carbon Dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer: B) Oxygen
(Plants release oxygen as a byproduct of photosynthesis.)

Question 25: What is the chemical symbol for silver?

A) Si
B) Ag
C) Au
D) Sr
Answer: B) Ag
(Silver’s symbol is Ag, derived from the Latin word “Argentum.”)

Question 26: Which element is the primary component of diamonds?

A) Oxygen
B) Carbon
C) Silicon
D) Nitrogen
Answer: B) Carbon
(Diamonds are made of carbon atoms arranged in a crystal lattice.)

Question 27: What is the chemical formula for sulfuric acid?

A) HCl
B) H₂SO₄
C) HNO₃
D) H₃PO₄
Answer: B) H₂SO₄
(Sulfuric acid is a strong acid with the formula H₂SO₄.)

Question 28: Which element is used in batteries?

A) Lithium
B) Sodium
C) Potassium
D) Calcium
Answer: A) Lithium
(Lithium is widely used in rechargeable batteries due to its high energy density.)

Question 29: What is the chemical symbol for sodium?

A) So
B) Na
C) Sd
D) No
Answer: B) Na
(Sodium’s symbol is Na, derived from the Latin word “Natrium.”)

Question 30: Which gas is responsible for the greenhouse effect?

A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Helium
Answer: B) Carbon Dioxide
(Carbon dioxide is a major contributor to the greenhouse effect.)

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