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What is sigma bond ?How is it formed?...

What is sigma bond ?How is it formed?

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Sigma bond is formed by end to end overlapping of bonding orbitals along the inrernuclear axis. This can be formed by any one of the following types of combination of atomic orbitals.
(i) s-s overlapping : In this two half filled s- orbital s-overlap along the internuclear axis.

(ii) s-p overlapping : This overlapping is formed between half filled p- orbital sof the two atoms.

(iii) p-p overlapping : This overlapping is formed between half filled p-orbitals of the two atoms.
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OMEGA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE -MULTIPLE CHOICE QUESTIONS
  1. What is sigma bond ?How is it formed?

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  2. A crystal has highest meltiing point. It is

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  3. Which one of the following has the shortest carbon carbon bond length?

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  4. The percentage of s- character in the hybrid orbitals sp, sp^(2)" and ...

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  5. In the co-ordinate valency

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  6. Which of the following has a net dipole moment?

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  7. Which of the following is diamagnetic?

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  8. In which one of the following sp^2 hybridisation?

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  9. The shape of sulphate ion is

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  10. The bond order for a species with the configuration, sigma1s^(2), sigm...

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  11. Which of the following is paramagnetic?

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

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  13. Which one shows maximum hydrogen bonding?

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  14. The weakest amoung the following types of bonds is

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  15. According to Fajan's rules covalent bonding is favourable by

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  16. The number of pi bonds in structure given are (NC)(2) C=C(CN)2

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  17. Which of the following compound is covalent?

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  18. Antibonding MO is formed by

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  19. In a hononuclear molecules, which of the following set of orbitals is...

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  20. Covalent compounds are soluble in

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  21. Which of the following has the largest de Broglie wavelength (all have...

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