NEET Exam > NEET Videos > Chemistry Class 11 > H Bonding in Molecules
H Bonding in Molecules Video Lecture | Chemistry Class 11 - NEET
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FAQs on H Bonding in Molecules Video Lecture - Chemistry Class 11 - NEET
| 1. What is hydrogen bonding in molecules? |  |
Ans. Hydrogen bonding is a type of attractive force that occurs between a hydrogen atom bonded to an electronegative atom (such as oxygen, nitrogen, or fluorine) and another electronegative atom in a different molecule. It is a relatively strong intermolecular force and plays a crucial role in determining the physical and chemical properties of many substances.
| 2. How does hydrogen bonding occur? | |
Ans. Hydrogen bonding occurs when a hydrogen atom forms a polar covalent bond with an electronegative atom, such as oxygen or nitrogen. The electronegative atom attracts the shared electron pair more strongly than the hydrogen atom, creating a partial positive charge on the hydrogen atom. This partial positive charge then attracts the partial negative charge of another electronegative atom in a neighboring molecule, leading to the formation of a hydrogen bond.
| 3. What are some examples of molecules that exhibit hydrogen bonding? | |
Ans. Some common examples of molecules that exhibit hydrogen bonding include water (H2O), ammonia (NH3), and hydrogen fluoride (HF). In water, for example, each water molecule can form hydrogen bonds with up to four neighboring water molecules, creating a network of intermolecular forces that give water its unique properties.
| 4. What are the effects of hydrogen bonding on the physical properties of substances? | |
Ans. Hydrogen bonding significantly affects the physical properties of substances. For example, substances with hydrogen bonding tend to have higher boiling points and melting points compared to similar substances that do not exhibit hydrogen bonding. This is because the hydrogen bonds need to be broken in order to change the substance from a solid to a liquid or a liquid to a gas. Hydrogen bonding also contributes to the high surface tension and viscosity of certain liquids.
| 5. Can hydrogen bonding occur within a single molecule? | |
Ans. No, hydrogen bonding typically occurs between different molecules rather than within a single molecule. This is because hydrogen bonding requires an electronegative atom in one molecule to interact with a hydrogen atom bonded to another electronegative atom in a different molecule. However, intramolecular hydrogen bonding can occur in some cases where a molecule has both an electronegative atom and a hydrogen atom within its structure.
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Dec 22, 2024 Last updated |
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