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Formation of a bridge bond is best expla...

Formation of a bridge bond is best explained by M.O.T. According to which a bridge bond is formed by filling electrons into molecular orbital, which spread over three nuclei, hence such bonds are specified as three centered bond.
Hybridization of B in diborane is

A

sp

B

`sp^2`

C

`sp^3`

D

None

Text Solution

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The correct Answer is:
C
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Give example of an electron-deficient hydride in which three centre-two electron bonds are present.

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Quantum mechanical calcuations show that mathematical mixing of certain combinaaation of orbitals in a given atom forms hybrid orbitals. The spatial orientations of these new orbitals lead to more stable bonds and are consistent with the observed molecular shapes . The process of orbital mixing is called hybridization and the new atomic orbitals are called hybrid orbitals.- Conditions (i) The no. of hybrid orbitals equal the number of atomic orbitalsmixed. (ii)The type of hybrid orbitals obtained varies with the type of atomic orbitals mixed. Rules to determine hybrid orbitals. Method i:Count no .of atoms directiy attached to central atom + lone pairs+single electrons. Method II: Count sigma - bonds+co-ordinate bonds+ lone pair+single electrons. If the number comes one to be 2 implies sp 5 implies sp^3d/dsp^3 3 implies sp^2 6 implies sp^3d^2/d^2sp^3 4 implies sp^3/dsp^2 7 implies sp^3d^3 Answer the following questions based on above passage : Hybrid states of Xe in XeF_2, XeF_4 and XeF_6 respectively are :

Binary compounds of various elements with hydrogen where hydrogen exhibit an oxidation number of (-1) are called binary hydrides. Nature of hydride obtained depends upon electronegativity of the element and hence on the type of bond formed Hydrides are mainly of three classes Ionic, saline or salt like hydrides. Covalent or Molecular hydrides. Metallic or interstitial hydrides. Which of the following is formed when LiH react with SO2?

Binary compounds of various elements with hydrogen where hydrogen exhibit an oxidation number of (-1) are called binary hydrides. Nature of hydride obtained depends upon electronegativity of the element and hence on the type of bond formed Hydrides are mainly of three classes Ionic, saline or salt like hydrides. Covalent or Molecular hydrides. Metallic or interstitial hydrides. Which of the following form metallic hydrides ?

PATHFINDER-P-BLOCK ELEMENTS -QUESTION BANK
  1. Aqueous solution of boric acid is treated with salicylic acid. Which o...

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  2. Formation of a bridge bond is best explained by M.O.T. According to wh...

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  3. Formation of a bridge bond is best explained by M.O.T. According to wh...

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  4. Silicon is second most abundant element occurring in earth crust. It i...

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  5. Silicon is second most abundant element occurring in earth crust. It i...

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  6. Match Column-I with Column-II

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  7. Match Column-I with Column-II

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  8. Match Column-I with Column-II

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  9. The number of sp^2 hybridized boron atoms in borax

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  10. On combustion of 1 mole of glucose the number of moles of CO2 produced...

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  11. The minimum number of moles of HCl required to completely react with 1...

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  12. In sheet silicate how many oxygen atoms of [SiO4]^(4-) are shared ?

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  13. Starting from boric acid, how would you prepare (i) meta and (ii) tetr...

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  14. Boron tribromide is stronger acid than boron trifluoride. Why ?

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  15. Can we prepare anhydrous AlCl3 by heating AlCl3. 6H2O ?

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  16. Aluminium fluoride is ionic while AlCl3 is covalent. Why ?

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  17. Explain the following "The ppi-ppi back bonding occurs in the halide...

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  18. Compound (X) on reduction with LiAlH4 gives a hydride (Y) containing 2...

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  19. Carbon tetrachloride is not affected but silicon tetrachloride is hydr...

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  20. Why Sn (II) is a reducing agent whereas Pb (II) is not ?

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