Basic Chemistry Quiz Questions And Answers

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Zohra Sattar Waxali, PhD (Chemistry) |
Chemistry
Review Board Member
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.
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  • 1/15 Questions

    Water is made of 1 oxygen molecule, and how many hydrogen atoms?

    • 3
    • 2
    • 1
    • 5
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About This Quiz

Welcome to our comprehensive Basic Chemistry Quiz, where we delve into the fundamental principles of chemistry to challenge and enlighten curious minds. Whether you're a chemistry enthusiast or simply looking to brush up on your knowledge, this quiz is designed to engage and educate. In this quiz, you'll encounter a diverse array of basic chemistry questions that cover essential concepts. From the building blocks of matter to chemical reactions, you'll explore topics that form the cornerstone of chemistry understanding. Our carefully curated questions are crafted to cater to both beginners and those seeking a quick refresher.

From identifying elements on the periodic table to understanding the principles of balancing equations, each question is a stepping stone toward a deeper comprehension of the subject. Embark on this educational adventure, challenge yourself with thought-provoking questions, and enhance your grasp of basic chemistry concepts. From beginners to enthusiasts, everyone can benefit from this engaging and informative quiz. Are you ready to put your chemistry knowledge to the test? Start the quiz now!

Basic Chemistry Quiz Questions And Answers - Quiz

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  • 2. 

    An acid has a pH below ______.

    • 7

    • 8

    • 9

    • 10

    Correct Answer
    A. 7
    Explanation
    An acid has a pH below 7 because pH is a measure of the concentration of hydrogen ions in a solution. Acids have a higher concentration of hydrogen ions, which makes the solution more acidic. A pH below 7 indicates that the solution is acidic, while a pH above 7 indicates that the solution is basic or alkaline. Therefore, an acid will always have a pH below 7.

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  • 3. 

    The atom is made of 3 subatomic particles. The subatomic particle found in the nucleus with a positive charge is the ___________.

    • Electron

    • Neutron

    • Proton

    • None of these

    Correct Answer
    A. Proton
    Explanation
    The correct answer is Proton. Protons are subatomic particles found in the nucleus of an atom and they carry a positive charge. They have a mass of approximately 1 atomic mass unit. Electrons, on the other hand, are negatively charged particles that orbit the nucleus, while neutrons are neutral particles also found in the nucleus.

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  • 4. 

    Gold is an example of a ______.

    • Molecule

    • Element

    • Atom

    • Covalent bond

    Correct Answer
    A. Element
    Explanation
    Gold is an example of an element because it is a pure substance that cannot be broken down into simpler substances by chemical means. Elements are made up of only one type of atom, and gold, with its atomic number 79, consists solely of gold atoms.

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  • 5. 

    What is the boiling point of water at standard atmospheric pressure (1 atmosphere)?

    • 0°C (32°F)

    • 100°C (212°F)

    • -273.15°C (-459.67°F)

    • 373.15°C (705.67°F)

    Correct Answer
    A. 100°C (212°F)
    Explanation
    At standard atmospheric pressure (1 atmosphere or 101.3 kPa), water boils at 100 degrees Celsius (212 degrees Fahrenheit). This is the temperature at which it transitions from a liquid to a gaseous state under normal atmospheric conditions.

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  • 6. 

    A base has a pH above _____.

    • 9

    • 8

    • 7

    • 10

    Correct Answer
    A. 7
    Explanation
    A base has a pH above 7 because pH is a measure of the concentration of hydrogen ions in a solution. A pH of 7 is considered neutral, so any pH above 7 indicates a higher concentration of hydroxide ions, which are characteristic of bases.

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  • 7. 

    The __________ is the smallest unit of matter.

    • Element

    • Molecule

    • Electron

    • Atom

    Correct Answer
    A. Atom
    Explanation
    An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus, which contains protons and neutrons, and electrons that orbit around the nucleus. Atoms combine to form molecules, but they cannot be broken down further without losing their chemical properties. Therefore, an atom is the correct answer as it represents the fundamental building block of matter.

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  • 8. 

    What is the water molecule if there is an uneven distribution of electrons within the molecule?

    • Uneven

    • Weird

    • Polar

    • Strange

    Correct Answer
    A. Polar
    Explanation
    The correct answer is "Polar". A water molecule is considered polar because there is an uneven distribution of electrons within the molecule. This occurs because oxygen, with its higher electronegativity, attracts the shared electrons more strongly than the hydrogen atoms. As a result, the oxygen end of the molecule has a partial negative charge, while the hydrogen ends have partial positive charges. This polarity gives water its unique properties, such as its ability to form hydrogen bonds and its high surface tension.

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  • 9. 

    Which of the following is a noble gas?

    • Oxygen

    • Hydrogen

    • Neon

    • Carbon

    Correct Answer
    A. Neon
    Explanation
    Neon is a noble gas. Noble gases, also known as inert gases or Group 18 elements, are a group of chemically unreactive gases located in the rightmost column of the periodic table. Neon (Ne) is one of the six naturally occurring noble gases, along with helium (He), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Noble gases have a complete set of electrons in their outermost electron shell, which results in a stable electron configuration and little to no tendency to react with other elements or compounds. This chemical inertness sets noble gases apart from other elements and gives them unique properties that make them useful in various applications, such as lighting, electronics, and low-temperature physics.

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  • 10. 

    In which bond are electrons transferred?

    • Covalent

    • Ionic

    • Double

    • None of these

    Correct Answer
    A. Ionic
    Explanation
    In an ionic bond, electrons are transferred from one atom to another. This often occurs between a metal and a non-metal, where the metal loses electrons to become a positively charged ion, and the non-metal gains those electrons to become a negatively charged ion. This transfer of electrons creates an electrostatic attraction between the two ions, resulting in the formation of an ionic bond.

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  • 11. 

    Carbon's atomic number is

    • 3

    • 4

    • 6

    • 8

    Correct Answer
    A. 6
    Explanation
    Carbon's atomic number is 6. The atomic number of an element corresponds to the number of protons in the nucleus of its atom. Carbon atoms have 6 protons, which is what defines the element as carbon. Carbon is a non-metal element with the symbol C, and its common isotopes have mass numbers of 12 and 13.

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  • 12. 

    What term describes the measure of disorder or randomness in a system?

    • Entropy

    • Enthalpy

    • Temperature

    • Pressure

    Correct Answer
    A. Entropy
    Explanation
    Entropy is a measure of the disorder or randomness within a system. In natural processes, entropy tends to increase, indicating the tendency of systems to become more disordered and less structured over time.

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  • 13. 

    What is the process of a substance changing directly from a solid to a gas called?

    • Fusion

    • Sublimation

    • Vaporization

    • Condensation

    Correct Answer
    A. Sublimation
    Explanation
    Sublimation is the phase transition where a substance changes directly from a solid to a gas without passing through the liquid phase. This occurs when the vapor pressure of the solid exceeds the pressure of its surroundings.

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  • 14. 

    _______ has the highest pH value. (Choose the highest one from the options)

    • Lime juice

    • Caustic soda

    • Water

    • Wine

    Correct Answer
    A. Caustic soda
    Explanation
    Caustic soda has the highest pH value among the given options. pH measures the acidity or alkalinity of a substance on a scale of 0-14, with values below 7 indicating acidity and values above 7 indicating alkalinity. Caustic soda, also known as sodium hydroxide, is a strong alkaline compound with a pH value of 14. Lime juice and wine are acidic, with pH values below 7, while water has a neutral pH of 7. Therefore, caustic soda has the highest pH value.

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  • 15. 

    Which of the following is the lightest gas?

    • Helium

    • Oxygen

    • Hydrogen

    • Nitrogen

    Correct Answer
    A. Hydrogen
    Explanation
    Hydrogen has an atomic weight of approximately 1 u (unified atomic mass units) and exists as a diatomic molecule (H2) with a molecular weight of approximately 2 u. This makes hydrogen lighter than helium, which has an atomic weight of approximately 4 u.

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Zohra Sattar Waxali |PhD (Chemistry) |
Chemistry
Dr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.

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  • Jun 28, 2025
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    Expert Reviewed by
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  • Jul 20, 2012
    Quiz Created by
    Meenujoshi87
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