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Chemistry Quiz
Chemistry · Medium
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 periodic trend describes the energy required to remove an electron from a gaseous atom, which generally increases from left to right across a period?
- A. Electronegativity
- B. Ionization Energy
- C. Electron Affinity
- D. Atomic Radius
-
What is the primary cause of deforestation?
- A. Mining
- B. Farming
- C. Natural fires
- D. Tourism
-
What is the atomic number of Oxygen?
- A. 9
- B. 8
- C. 6
- D. 7
-
What is the name of the analytical technique used to separate a mixture of chemical substances into its individual components based on their different speeds through a stationary phase?
- A. Titration
- B. Spectroscopy
- C. Chromatography
- D. Mass Spectrometry
-
What is the valency of Magnesium?
- A. 3
- B. 1
- C. 2
- D. 4
-
What is the symbol for Mercury?
- A. Me
- B. Mg
- C. Hg
- D. Hy
-
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
-
Which separation technique is based on differences in the boiling points of the components in a liquid mixture?
- A. Filtration
- B. Distillation
- C. Chromatography
- D. Decan'tation
-
What is the main contributor to the carbon footprint?
- A. Water waste
- B. Carbon dioxide emissions
- C. Noise
- D. Plastic use
-
What is the chemical formula for Chalk?
- A. CaO
- B. Ca(OH)2
- C. CaCl2
- D. CaCO3
-
In chemistry, one 'mole' of a substance contains approximately how many elementary entities (Avogadro's number)?
- A. 3.14 x 10^23
- B. 6.022 x 10^23
- C. 9.81 x 10^23
- D. 1.602 x 10^23
-
What is the large landmass that existed millions of years ago?
- A. Atlantis
- B. Laurasia
- C. Gondwana
- D. Pangea
-
What is the chemical formula for Baking Soda?
- A. Na2CO3
- B. NaHCO3
- C. NaOH
- D. NaCl
-
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
-
Which laboratory technique is used to determine the unknown concentration of a solute in a solution by reacting it with a known concentration of another?
- A. Distillation
- B. Titration
- C. Filtration
- D. Centrifugation
-
Which element is used in the manufacture of matches?
- A. Sulfur
- B. Magnesium
- C. Phosphorus
- D. Potassium
-
What is the process of rusting?
- A. Reduction
- B. Hydration
- C. Carbonation
- D. Oxidation
-
What term describes atoms of the same element that have the same number of protons but a different number of neutrons?
- A. Isomers
- B. Isotopes
- C. Allotropes
- D. Isobars
-
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