Chemistry Quiz
Chemistry · Timed
20 questions · 10 min timer · Instant feedback
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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What is the main cause of acid rain?
- A. Planting trees
- B. Burning fossil fuels
- C. Nuclear power
- D. Solar flares
-
What is the pH of a strong acid?
- A. 1
- B. 7
- C. 14
- D. 10
-
Which gas is the primary byproduct of the complete combustion of fossil fuels and is the most significan't human-contributed greenhouse gas?
- A. Methane
- B. Nitrous Oxide
- C. Carbon Dioxide
- D. Ozone
-
Which type of chemical bonding involves a 'sea of delocalized electrons' moving freely between positively charged metal nuclei?
- A. Covalent Bonding
- B. Ionic Bonding
- C. Metallic Bonding
- D. Hydrogen Bonding
-
What is the term for a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist?
- A. Bohr Model
- B. Lewis Structure
- C. Phase Diagram
- D. Reaction Coordinate
-
What are the basic building blocks of proteins, consisting of an amino group and a carboxyl group?
- A. Nucleotides
- B. Fatty Acids
- C. Amino Acids
- D. Monosaccharides
-
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 name for the random, erratic motion of microscopic particles suspended in a fluid, which provided experimental proof of the existence of atoms?
- A. Brownian Motion
- B. Quantum Fluctuations
- C. Osmosis
- D. Capillary Action
-
Which is a major source of water pollution?
- A. Rocks
- B. Fish
- C. Rain
- D. Fertilizer runoff
-
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
-
What is H2O commonly known as?
- A. Oxygen
- B. Salt
- C. Hydrogen
- D. Water
-
What is the chemical symbol for Potassium?
- A. Pt
- B. Po
- C. P
- D. K
-
The process of 'rusting' is a common example of which type of chemical reaction?
- A. Oxidation
- B. Reduction
- C. Acid-Base
- D. Substitution
-
What is the atomic number of Carbon?
- A. 6
- B. 8
- C. 4
- D. 12
-
Who proposed the first modern atomic theory in the early 1800s, suggesting that all matter is composed of small, indivisible particles called atoms?
- A. J.J. Thomson
- B. John Dalton
- C. Ernest Rutherford
- D. Niels Bohr
-
Which element is used in the manufacture of matches?
- A. Sulfur
- B. Magnesium
- C. Phosphorus
- D. Potassium
-
What is the unit of concentration defined as the number of moles of solute per liter of solution?
- A. Molality
- B. Normality
- C. Molarity
- D. Mass Percent
-
What is acceleration due to gravity (m/s^2)?
- A. 9.8
- B. 10
- C. 8.9
- D. 9.2
-
Which layer protects Earth from UV radiation?
- A. Dust layer
- B. Oxygen layer
- C. Ozone layer
- D. Carbon layer
-
Which gas is evolved during the action of acid on metals?
- A. Hydrogen
- B. CO2
- C. Nitrogen
- D. Oxygen