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Chemical Bonding and Molecular Structure

Long Answer Type

161.

Explain coordinate bond by the orbital concept.

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162.

Differentiate between a covalent bond and co-ordinate bond.

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Short Answer Type

163.
What do you understand by geometry and shapes of molecules?

The definite arrangement of various bonded atoms in a molecule is called the geometry of the molecule. The shape of a molecule (or molecular shape) is the arrangement of the atoms in a molecule with respect to each other i.e. the angle between atoms and length of the covalent bonds (bond lengths). The molecules may have different bond lengths and bond angles and so might have different molecular shapes.

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164.

Why do covalent moleucles have definite geometery?

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Long Answer Type

165.

Name the theory responsible for the definite geometry of covalent molecules. Give main features of the theory ?

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Short Answer Type

166.

What do you mean by Regular geometry and Irregular or Distorted geometry?

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167.

How will you explain the following order of the repulsive interactions between pair of electrons on the central atom:
Lone pair - Lone pair > Lone pair - Bond pair > Bond pair - Bond pair.

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