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प्रश्न
Explain in brief with one example of a covalent bond
उत्तर
The attractive force which exists due to the mutual sharing of electrons between the two atoms of similar electronegativity or having a small difference in electronegativities is called a covalent bond.
Formation of H2 molecule:
- The electronic configuration of the H atom is 1s1.
- It needs one more electron to complete its valence shell.
- When two hydrogen atoms approach each other at a certain internuclear distance, they share their valence electrons.
- The shared pair of electrons belong equally to both the hydrogen atoms. The two atoms are said to be linked by a single covalent bond and an H2 molecule is formed.
\[\ce{H. + .H->\underset{\text{shared pair of electrons}}{H:H}}\] OR H–H
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संबंधित प्रश्न
Explain the Formation of a Chemical Bond.
Write Lewis symbols for the following atoms and ions: S and S2–.
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Answer in one sentence:
Covalent bond is directional in nature. Justify.
In which of the following, the central atom does NOT have lone pair(s) of electrons?
The condensed electronic configuration [Ne] 3s2 3p5 denotes the element ____________.
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Match the items given in Column I with examples given in Column II.
| Column I | Column II |
| (i) Hydrogen bond | (a) \[\ce{C}\] |
| (ii) Resonance | (b) \[\ce{LiF}\] |
| (iii) Ionic solid | (c) \[\ce{H2}\] |
| (iv) Covalent solid | (d) \[\ce{HF}\] |
| (e) \[\ce{O3}\] |
