Chemistry Board Exam 2024: MCQ Questions
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Questions and Answers

What is the chemical symbol for the element with atomic number 6?

  • He
  • O
  • C (correct)
  • N
  • What is the pH value of a solution with a hydrogen ion concentration of $10^{-3}$ M?

  • pH 5
  • pH 3 (correct)
  • pH 11
  • pH 7
  • What is the relationship between the atomic number and the number of protons in an atom?

  • They are always equal (correct)
  • There is no fixed relationship between them
  • The atomic number is always greater than the number of protons
  • The atomic number is always less than the number of protons
  • Which subatomic particle is responsible for the mass of an atom?

    <p>Proton</p> Signup and view all the answers

    Which of the following is true regarding the properties of noble gases?

    <p>They exist as diatomic molecules in nature</p> Signup and view all the answers

    Which statement is true about the process of sublimation?

    <p>It bypasses the liquid phase and directly converts a solid to a gas</p> Signup and view all the answers

    Study Notes

    Elements and Compounds

    • The chemical symbol for the element with atomic number 6 is Carbon (C).

    Acids and Bases

    • A pH value of a solution can be calculated based on the hydrogen ion concentration, for example, a solution with a hydrogen ion concentration of $10^{-3}$ M has a pH of 3.

    Atomic Structure

    • The atomic number of an atom is equal to the number of protons in an atom, which determines the identity of an element.

    Subatomic Particles

    • Neutrons, along with protons, are responsible for the mass of an atom, with protons being positively charged and neutrons having no charge.

    Noble Gases

    • Noble gases are unreactive and stable due to their full outer energy level, making them resistant to reacting with other elements.

    Phase Changes

    • Sublimation is the process by which a solid changes directly to a gas, without passing through the liquid phase, typical of substances with low melting and boiling points.

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    Description

    Prepare for your 2024 board exam with these multiple-choice questions on chemistry. Test your knowledge on chemical symbols, subatomic particles, and pH values of solutions.

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