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Direct overlap leads...

Direct overlap leads

A

`sigma ` bond

B

`pi` bond

C

both ` sigma & pi` Bonds

D

Niether ` sigma ` nor `pi` bond

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The correct Answer is:
A
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When half-filled valence orbital of one atom overlaps with half-filled valence orbital of other atom, a covalent bond is fonned. Head on or axial overlap leads to the fonnation of sigma bond. Sidewise or lateral overlap of atomic orbitals (p) give rise to the formation of pi -bond. Similarly side wise overlap between d-orbitals can lead to the fomation of delta -bond. In case of pi -bond, the probability of finding the shared electron cloud is zero along the line joining two nuclei while ithe probability of finding the shared electron cloud is maximum along the inter nuclear axis. The strength of bonds by s-s, p-p, s-p overlap is in the order :

When half-filled valence orbital of one atom overlaps with half-filled valence orbital of other atom, a covalent bond is fonned. Head on or axial overlap leads to the fonnation of sigma bond. Sidewise or lateral overlap of atomic orbitals (p) give rise to the formation of pi -bond. Similarly side wise overlap between d-orbitals can lead to the fomation of delta -bond. In case of pi -bond, the probability of finding the shared electron cloud is zero along the line joining two nuclei while ithe probability of finding the shared electron cloud is maximum along the inter nuclear axis. lf x-axis is the internuclear axis then which of the following combination will result into the formation of pi -bond?

When the margins of sepals or petals overlap one another without any particualr direction, the condition is termed as

Red lead is

Black lead is

Pencil lead is

What is the ratio of overlapping margins of petals to overlapped ones in imbricate aestivation?

Bonding formation between two atoms is then envisaged as the progressive overlapping of an atomic orbital from each of the participating atoms, the greater the overlap achieved (the overlap integral), the stronger the bond so formed. For sigma bond formation the relative overlapping power of :

The type of overlap present in the bonds of hydrogen sulphide molecule is

AAKASH SERIES-CHEMICAL BONDING-OBJECTIVE EXERCISE-2A (COVALENT AND DATIVE BOND)
  1. The element that exhibits neither electrovalency nor covalency is

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  2. The attraction that non-polar molecules have for each other is primari...

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  3. The compound which contains both ionic and covalent bonds is

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  4. Which of the following ion has maximum polarising power

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  5. The bond between chlorine and bromine in BrCl is

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  6. Oxygen cannot exhibit tetravalency and hexavalency like sulphur. This ...

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  7. The covalency of nitrogen in HNO2 is

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  8. van der Walls forces are maximum in the following substance

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  9. An aqueous solution of silver nitrate gives a white precipitate with

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  10. Which of the following is very much volatile ?

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  11. Which of the following is truely covalent?

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  12. Which of the following is covalent?

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  13. If the electronegativity of two atoms is low, then expected bond betwe...

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  14. Direct overlap leads

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  15. The bonds present in N2O5 are

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  16. In which type of bond fomation, can a proton participate?

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  17. The bonds present in [Cu(NH3)4] SO4 between copper and ammonia are

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  18. The types of bonds present in CuSO4.5H2 O are

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  19. (A): BeF2 is predominently a covalent compound. (R) : Electronegativit...

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  20. (A) : SiF4 has octet configuration, but acts as an electron pair accep...

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