Chemistry Board Exam 2024: MCQ Questions

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6 Questions

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

C

What is the pH value of a solution with a hydrogen ion concentration of $10^{-3}$ M?

pH 3

What is the relationship between the atomic number and the number of protons in an atom?

They are always equal

Which subatomic particle is responsible for the mass of an atom?

Proton

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

They exist as diatomic molecules in nature

Which statement is true about the process of sublimation?

It bypasses the liquid phase and directly converts a solid to a gas

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.

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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