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The crystals which are good conductors ...

The crystals which are good conductors of electricity and heat are

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(i) The bonding in metal is explained by molecular orbital theory. As per this theory, the atomic orbitals of large number of atoms in a crystal overlap to form numerous bonding and anti-bonding molecular orbitals without any band gap.
(ii) The bonding molecular orbitals are completely filled with an electron pair in each, and the anti-bonding molecular orbitals are empty.
(iii) Absence of band gap accounts for high clectrical conductivity of metals.
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FULL MARKS-CHEMICAL BONDING -ADDITIONAL QUESTIONS SOLVED (2-MARK QUESTIONS)
  1. Explain the bond formation of hydrogen molecule.

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  2. Explain the bond formation of hydrogen molecule.

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  3. Identify the bond between H and F in HF molecule.

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  4. What is meant by colloid ?

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  5. Why metallic bonding is referred as electronic bonding?

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  6. Metals have density .

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  7. Metals are ductile in nature. Why?

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  8. The melting point of aluminium is .

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  9. The crystals which are good conductors of electricity and heat are

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  10. Metals have high thermal conductivity. Give reason.

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  11. Except Cu, Ag and Au, most metals are black. Why?

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  12. Write the favourable factors for the formation of ionic bond.

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  13. Although geometries of NH(3) and H(2)O molecules are distorted tetrah...

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  14. Write the significance/applications of dipole moment.

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  15. CO(2) and H(2)O both are triatomic molecules but their dipole moment ...

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  16. What is the total number of sigma and pi bonds in the following molecu...

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  17. Use molecular orbital theory to explain why the Be(2) molecule does no...

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  18. Compare the relative stability of the following species and indicate t...

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  19. Account for the following: (i) water is a liquid while H(2)S is a ga...

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  20. Why B(2) is paramagnetic in nature while C(2) is not?

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