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Direct overlap leads...

Direct overlap leads

A

`sigma` bond

B

`pi` bond

C

Both `sigma` and `pi` bonds

D

Neither `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

In the region of A-band of a myofibril of a skeletal muscle where thick and thin filaments overlap. each thick filament is surrounded by

Red lead is

Pencil lead is

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AAKASH SERIES-CHEMICAL BONDING-OBJECTIVE EXERCISE -2(COVALENT AND DATIVE BOND )
  1. Which of the following is covalent?

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

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  3. Direct overlap leads

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  4. The bonds present in N(2)O(5) are

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

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

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  7. How many water molecules present in CuSO(4).5H(2)O are hydrogen bonded...

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  8. The element that exhibits neither electrovalency nor covalency is

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  9. Octet rule is mostly violated in the compounds formed by

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  10. In molecule, the formal charges of oxygen atoms 1,2,3 are respecti...

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  11. Which of the following statemets in incorrect for PCl(5)?

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  12. The attraction that non polar molecules have for each orther is primar...

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  13. In bisulphate ion the formal charge on sulphur atom is

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

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  15. Which of the following ion has maximum polarising power

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  16. The bond between chlorine and bromine in BrCl is

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

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  18. Which of the following is the most likely Lewis structure of nitroslyl...

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  19. The following are some statements about the characteristics of covalen...

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  20. Some statements about valence bond theory are given below (i) The st...

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