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Bond Parameters - Bond Order, Angle, Length, and Energy MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

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  • Bond Parameters: length, angle, energy, strength is considered one of the most asked concept.

  • 13 Questions around this concept.

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Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules 

Concepts Covered - 1

Bond Parameters: length, angle, energy, strength

Bond length

It is the distance between the nuclei of two bonded atoms when the lowest potential energy between the atoms is achieved.

Bond angle

It is the angle between any two covalent bonds that share a common atom as shown in figure.

A pair of images are shown. The left image shows a carbon atom with three atoms bonded in a triangular arrangement around it. There are two hydrogen atoms bonded on the left side of the carbon and the angle between them is labeled, “118 degrees” and, “Bond angle.” The carbon is also double bonded to an oxygen atom. The double bond is shaded and there is a bracket which labels the bond, “Bond length ( angstrom ), ( center to center ),” and, “1.21 angstrom.” The right image shows a ball-and-stick model of the same elements. The hydrogen atoms are white, the carbon atom is black, and the oxygen atom is red.

Bond distances (lengths) and angles are shown for the formaldehyde molecule, H2CO.

Bond energy

It is the energy required to break one mole of bonds between two atoms in a gaseous state. For example, the bond enthalpy of H-H bond is  435.8 kJ/mol.

Bond Strength

It is the strength by which the bonded atoms are held together in a molecule. It is measured in terms of the bond energy, in other words, it is the amount of energy required to break the bond.

 

 

 

Average Bond Lengths and Bond Energies for Some Common Bonds

Bond

Bond Length (Å)

Bond Energy (kJ/mol)

C–C

1.54

345

C=C

1.34

611

C≡C

1.20

837

C–N

1.43

290

C=N

1.38

615

C≡N

1.16

891

C–O

1.43

350

C=O

1.23

741

C≡O

1.13

1080

 

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Bond Parameters: length, angle, energy, strength

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Bond Parameters: length, angle, energy, strength

Chemistry Part I Textbook for Class XI

Page No. : 107

Line : 25

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