NEET Exam > NEET Videos > Physical Chemistry for NEET > Covalent & Ionic Bonds
Covalent & Ionic Bonds Video Lecture | Physical Chemistry for NEET
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FAQs on Covalent & Ionic Bonds Video Lecture - Physical Chemistry for NEET
| 1. What is the difference between a covalent bond and an ionic bond? |  |
Ans. A covalent bond is formed when two atoms share electrons, while an ionic bond is formed when one atom transfers electrons to another atom. In a covalent bond, the atoms have similar electronegativities, resulting in a sharing of electrons. In contrast, in an ionic bond, one atom has a significantly higher electronegativity, causing it to attract and take electrons from the other atom.
| 2. Can atoms form both covalent and ionic bonds? | |
Ans. Yes, atoms can form both covalent and ionic bonds. It depends on the difference in electronegativity between the atoms involved. If the electronegativity difference is small, a covalent bond will form, while a large electronegativity difference will result in an ionic bond. Some atoms, such as carbon, can form both types of bonds depending on the elements they are bonding with.
| 3. How does the strength of a covalent bond compare to that of an ionic bond? | |
Ans. Generally, covalent bonds are stronger than ionic bonds. Covalent bonds involve the sharing of electrons, which creates a strong bond between atoms. Ionic bonds, on the other hand, are based on the attraction between positively and negatively charged ions. While ionic bonds can be strong, they are typically weaker than covalent bonds due to the absence of direct electron sharing.
| 4. Can you give examples of compounds that have covalent and ionic bonds? | |
Ans. Yes, for example, water (H2O) has covalent bonds. The oxygen atom shares electrons with two hydrogen atoms, forming a covalent bond. On the other hand, sodium chloride (NaCl) has ionic bonds. Sodium donates an electron to chlorine, resulting in the formation of positively charged sodium ions and negatively charged chloride ions.
| 5. How do the properties of compounds with covalent and ionic bonds differ? | |
Ans. Compounds with covalent bonds often have lower melting and boiling points compared to compounds with ionic bonds. This is because covalent compounds consist of individual molecules held together by relatively weak intermolecular forces, while ionic compounds form a lattice structure with strong electrostatic attractions between ions. Additionally, compounds with covalent bonds tend to be poor conductors of electricity, while compounds with ionic bonds are typically good conductors when dissolved in water or melted.
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Nov 21, 2024 Last updated |
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