question Which type of bond is characterized by an equal sharing of electrons between atoms

Chemistry

Which type of bond is characterized by an equal sharing of electrons between atoms?

A. Nonpolar covalent
B. Polar covalent
C. Ionic
D. Metallic

Nonpolar covalent bonds involve equal sharing of electrons.

What is the term for the process by which light is emitted as electrons return to lower energy levels?

A. Emission spectrum
B. Absorption spectrum
C. Fluorescence
D. Incandescence

What is the common name for acetic acid (CH₃COOH)?

A. Vinegar acid
B. Citrus acid
C. Tartaric acid
D. Lactic acid

A chemical reaction that absorbs heat from the surroundings is termed:

A. Endothermic
B. Exothermic
C. Combustion
D. Redox

What is the primary function of a buffer solution in potentiometric titrations?

A. Maintains a constant pH
B. Enhances the color of the solution
C. Accelerates the reaction rate
D. Increases the sensitivity of the electrode

The R value in the ideal gas law equation PV = nRT represents the:

A. Gas constant
B. Ideal pressure
C. Universal gas constant
D. Volume constant

The Joule-Thomson effect describes the change in temperature of a gas during:

A. Isobaric expansion
B. Isothermal compression
C. Adiabatic process
D. Isenthalpic process

The compound H₂O is commonly known as:

A. Water
B. Hydrogen peroxide
C. Hydrochloric acid
D. Hydrogen sulfide

What is the main function of hemoglobin in red blood cells?

A. Transporting oxygen
B. Assisting in cell division
C. Facilitating digestion
D. Providing structural support

What is the pH of a solution with a hydrogen ion concentration of 1 x 10⁻¹² M?

A. 12
B. 2
C. 4
D. 6

The bond angle in a water (H2O) molecule is approximately:

A. 104.5°
B. 120°
C. 180°
D. 90°