Direction: In the following questions, a statement of Assertion (A) f...
H2O2 is more extensively associated by hydrogen bonding than water.
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Direction: In the following questions, a statement of Assertion (A) f...
Assertion: H2O2 has a higher boiling point than water.
Reason: The dipole moment of H2O2 is slightly higher than that of H2O.
Explanation:
- H2O2, also known as hydrogen peroxide, is a chemical compound composed of two hydrogen atoms and two oxygen atoms. Water, on the other hand, is composed of two hydrogen atoms and one oxygen atom.
- The boiling point of a substance is the temperature at which it changes from a liquid to a gas. It is determined by the strength of intermolecular forces between the molecules.
- In the case of water, the high boiling point is attributed to its strong hydrogen bonding. The oxygen atom in water is highly electronegative, causing it to draw the shared electrons towards itself, creating a partial negative charge. This partial negative charge attracts the partial positive charge on the hydrogen atoms of neighboring water molecules, forming hydrogen bonds. These hydrogen bonds are relatively strong, requiring a significant amount of energy to break and convert water into a gas.
- Hydrogen peroxide also exhibits hydrogen bonding, but to a lesser extent compared to water. The extra oxygen atom in H2O2 disrupts the formation of extensive hydrogen bonding. As a result, the dipole moment of H2O2 is slightly higher than that of water, indicating a stronger overall polarity. However, the dipole moment alone does not solely determine the boiling point of a substance.
- The boiling point of a substance is influenced by multiple factors, including the strength of intermolecular forces, molecular weight, and shape of the molecule. While the dipole moment of H2O2 is slightly higher than that of H2O, it is not the main reason for its higher boiling point.
- Therefore, the assertion is true, as H2O2 does have a higher boiling point than water. However, the reason provided is not a correct explanation for this observation.
- In conclusion, option B is the correct answer as both the assertion and the reason are true, but the reason is not a correct explanation of the assertion.
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