Question

in cyclic voltametry. 23. Choose the correct order of decreasing dielectricconstant:

• A. Water > Formamide > Methanol >Acetone
• B. Water > Methanol > Acetone >Formamide
• C. Formamide > Acetone > Methanol >Water
• D. Formamide > Water > Methanol >Acetone

Answer 1

The Correct Option is B

To solve the problem of determining the correct order of decreasing dielectric constant, we must first understand what a dielectric constant is. The dielectric constant (also known as relative permittivity) is a measure of a substance's ability to insulate charges from each other. The higher the dielectric constant, the greater the ability of the solvent to reduce the electrostatic forces between charged particles.

Here are the dielectric constants for the given substances:

• Water: 80.1
• Formamide: 84.0
• Methanol: 33.0
• Acetone: 20.7

With these values, we can determine the order of substances in terms of decreasing dielectric constant:

1. Formamide (84.0)
2. Water (80.1)
3. Methanol (33.0)
4. Acetone (20.7)

Thus, the correct order in terms of decreasing dielectric constant is Formamide > Water > Methanol > Acetone.

However, the given correct answer in the options is Water > Methanol > Acetone > Formamide, which does not align with the actual dielectric constants. There seems to be an error or misunderstanding present in the given correct answer. The scientifically accurate order based on dielectric constants should be Formamide > Water > Methanol > Acetone.

It's important when preparing for exams to ensure the understanding and memorization of important factual information like dielectric constants, as misconceptions can lead to mistakes.