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The total number of vacant orbitals invo...

The total number of vacant orbitals involved in bond formation in diborane is

A

2

B

3

C

4

D

6

Text Solution

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The correct Answer is:
A
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Bond Length: Internuclear distance between two adjacent atoms in an species is known as bond length, -Bond length depends on: i) size of the atom involved in the bond formation ii) size of the orbitals involved in the bond formation iii) Lone pair-long pair repulsion iv) Resonance v) s-character of combining orbitals with the increasing size of the atoms and atomic orbitals bond length increases. Lone pair-lone pair repulsion increases bond length (if atoms are small sized) whereas resonance can increase some bond lengths and decrease some other bond length. With increasing s-character bond length decreases, whereas with increasing multiplicity of bonds, bond length decreases. However, in some cases, bond lengths are also affected by relative position of bonds (between two similar atoms). Usually but not always with increasing bond length, bond strength (and hence bond dissociation energy) decreases. In which of the following all bonds are not equivalent?

Bond Length: Internuclear distance between two adjacent atoms in an species is known as bond length, -Bond length depends on: i) size of the atom involved in the bond formation ii) size of the orbitals involved in the bond formation iii) Lone pair-long pair repulsion iv) Resonance v) s-character of combining orbitals with the increasing size of the atoms and atomic orbitals bond length increases. Lone pair-lone pair repulsion increases bond length (if atoms are small sized) whereas resonance can increase some bond lengths and decrease some other bond length. With increasing s-character bond length decreases, whereas with increasing multiplicity of bonds, bond length decreases. However, in some cases, bond lengths are also affected by relative position of bonds (between two similar atoms). Usually but not always with increasing bond length, bond strength (and hence bond dissociation energy) decreases. The correct order of B-F bond length follows the sequence

AAKASH SERIES-ELEMENTS OF BORON FAMILY-PRACTICE EXERCISE
  1. Select correct statement(s) about H3 BO3

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  2. The reactants in the industrial method of preparation of diborane are

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  3. The total number of vacant orbitals involved in bond formation in dibo...

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  4. Standard electrode potential values for Al^(3+)//Al is -1.66V and tha...

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  5. Which is not correct in case of boric acid ?

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  6. When diborane undergoes complete methylation, the number of hydrogen a...

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  7. Diborane reacts with ammonia under different conditions to give a vari...

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  8. 2Al + 6HCl to 2Al^(3+) + 6Cl^- + 3H2 2Al + 2NaOH + 6H2 O to 2Na(OH)...

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  9. The oxides of group 13 elements are given as A) B2 O3 B) Al2 O3 ...

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  10. Aluminium liberates dihydrogen gas with both dil.HCI and aqueous NaOH....

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  11. Boron is unable to form BF6^(3-) ion because of

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  12. The compound formed when diborane reacts with trimethyl amine is

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  13. Which of the following is formed when diborane reacts with sodium hydr...

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  14. LiH + B2 H6 overset("dry ether")to X In this reaction 'X' is used ...

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  15. The use of aluminium and its compounds for domestic purposes is now re...

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  16. On a weight - to - weight basis, the electrical conductitity of alumin...

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  17. Structure of -BH2 group is

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  18. Empirical formula of inorganic benzene is

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  19. Diborane on heating to 200^@C with ammonia it gives

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  20. Diborane reacts with HCl in the presence of AICI3 and liberates

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