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Non-bonding orbitals have...

Non-bonding orbitals have

A

same energy as the atomic orbitals from which they are formed

B

more energy than the atomic orbitals of the highest energy from which they are formed

C

less energy than the atomic orbitals of the lowest energy from which they are formed

D

none of these.

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The correct Answer is:
A
Non-bonding orbitals have same energy as the atomic orbitals from which they are formed
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Most of the polyatomic molecules except a few such as CO_(2) and CS_(2) are linear or angular with a bond angle generally somewhat greater than 90^(@) A bond angle is defined as the angle between the direction of two covalent bonds Since the atoms in molecules are in constant motion with respect to each other they are not expected to have a fixed value of bond angle Repulsion between non-bonded atoms alone does not provide an adequate explanation Hybridisation of bonding orbitals an adequate explanation Hybridisation of bonding orbitals also plays a very important role in detrmining the value of bond angle It has been observed that in hybridisation as the s-character of hybrid orbital increases the bond angle increases Which of the following hybridisation may have more than one type of bond angle ? .

Most of the polyatomic molecules except a few such as CO_(2) and CS_(2) are linear or angular with a bond angle generally somewhat greater than 90^(@) A bond angle is defined as the angle between the direction of two covalent bonds Since the atoms in molecules are in constant motion with respect to each other they are not expected to have a fixed value of bond angle Repulsion between non-bonded atoms alone does not provide an adequate explanation Hybridisation of bonding orbitals an adequate explanation Hybridisation of bonding orbitals also plays a very important role in detrmining the value of bond angle It has been observed that in hybridisation as the s-character of hybrid orbital increases the bond angle increases Which of the following have highest bond angle ? .

Compare and contrast the concepts of hybrid orbitals and molecular orbitals with respect to (i) The number of atoms involved (ii) The number of orbitals produced from a given number of ground state orbitals (iii) The energies of the resulting orbitals with respect to one another (b) Distinguish between non-bonding and antibonding orbitals .

If two different non-axial d-orbitals having 'xz' nodal plane form pi -bond by overlapping each other, then internuclear axis will be :

DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-Ultimate Preparatory Package
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