Question

Dielectric constant of water at 25\( ^{\circ} \)C is:

• A. \( 1.0006 \)
• B. \( 2.25 \)
• C. \( 78.2 \)
• D. \( 100 \)

Hint:

The dielectric constant decreases with temperature, meaning hotter water has lower ion-dissolving capacity.

Answer 1

The Correct Option is C

The dielectric constant of water at 25\( ^{\circ} \)C is approximately 78.2, which makes it an excellent solvent for ionic and polar compounds. This high dielectric constant enables water to strongly reduce electrostatic interactions between dissolved ions. Water's dielectric properties are essential for various biological and chemical processes, including protein folding and enzymatic reactions.