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Chemistry Quiz
Chemistry · Astronomy Quiz
20 questions · Unlimited attempts · Free online practice
Chemistry is the science that explains what everything around us is made of and how substances change. From the air we breathe and the water we drink to medicines, food, and modern...
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All 20 questions in this Chemistry quiz
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Which acid is present in an ant's sting?
- A. Acetic Acid
- B. Formic Acid
- C. Malic Acid
- D. Citric Acid
-
What is the process of rusting?
- A. Reduction
- B. Hydration
- C. Carbonation
- D. Oxidation
-
Which layer protects Earth from UV radiation?
- A. Dust layer
- B. Oxygen layer
- C. Ozone layer
- D. Carbon layer
-
What is the chemical symbol for Silver?
- A. Sr
- B. Si
- C. Au
- D. Ag
-
What is the minimum amount of energy required to initiate a chemical reaction?
- A. Thermal Energy
- B. Kinetic Energy
- C. Activation Energy
- D. Potential Energy
-
In atomic theory, what is the term for the specific arrangement of electrons in an atom's shells and subshells?
- A. Electron Affinity
- B. Electron Configuration
- C. Quantum Distribution
- D. Valence Mapping
-
In an electrochemical cell, at which electrode does 'oxidation' (the loss of electrons) always occur?
- A. Cathode
- B. Anode
- C. Salt Bridge
- D. Electrolyte
-
Which type of solid is characterized by a continuous 3D network of covalent bonds, such as in diamond or quartz?
- A. Molecular Solid
- B. Ionic Solid
- C. Covalent Network Solid
- D. Metallic Solid
-
A reaction that absorbs thermal energy from its surroundings, causing a drop in temperature, is classified as what?
- A. Exothermic
- B. Endothermic
- C. Adiabatic
- D. Combustion
-
Why is water (H2O) considered a 'polar' molecule?
- A. It can exist in three states
- B. It has an asymmetrical shape and an uneven distribution of electron charge
- C. It contains only ionic bonds
- D. It freezes at zero degrees Celsius
-
Which instrument measures wind direction?
- A. Rain gauge
- B. Weather vane
- C. Barometer
- D. Anemometer
-
Which international day is April 22nd?
- A. Environment Day
- B. Water Day
- C. Earth Day
- D. Health Day
-
Who developed the Three Laws of Motion?
- A. Newton
- B. Einstein
- C. Pascal
- D. Galileo
-
What thermodynamic property measures the total heat content of a system at constant pressure?
- A. Entropy
- B. Gibbs Free Energy
- C. Enthalpy
- D. Internal Energy
-
Which rock is formed from the transformation of existing rock?
- A. Sedimentary
- B. Metamorphic
- C. Igneous
- D. Lava
-
What is the 'Three Rs' of environment?
- A. Reduce/Reuse/Recycle
- B. Read/Write/Arithmetic
- C. Rain/River/Rock
- D. Run/Race/Ride
-
Which triatomic molecule, found high in the Earth's atmosphere, protects the planet by absorbing most of the Sun's harmful ultraviolet radiation?
- A. O2 (Dioxygen)
- B. O3 (Ozone)
- C. CO2
- D. N2
-
How many valence electrons does an atom of Oxygen (atomic number 8) typically have in its outer shell?
- A. 2
- B. 4
- C. 6
- D. 8
-
Which element is known as the 'King of Chemicals'?
- A. Oxygen
- B. Sulfuric Acid
- C. Hydrogen
- D. Nitrogen
-
Who is known for the equation E=mc^2?
- A. Albert Einstein
- B. Nikola Tesla
- C. Isaac Newton
- D. Marie Curie