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Introduction of VSEPR

Electron pair...

Question

Electron pairs occupy localised orbitals. Their orbitals are oriented in such a way that the repulsion between electron clouds becomes:

A

zero

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B

minimum

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C

maximum

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D

infinite

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Solution

The correct option is D minimum
For an atom to exist in equillibrium, there should be minimum repulsion between its electron pairs. Therefore, their orbitals containing electron pairs are oriented in such a way that the repulsion between electron clouds becomes minimum.

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Q. Electron pairs occupy localised orbitals. Their orbitals electron are oriented in such a way that the repulsion between electron clouds becomes

Statement (1) : Molecular compound exhibits linear structure when maximum repulsion is there between two electron pairs.

Statement (2) : According to VSEPR model like charges orient themselves in such a way that there is least repulsion between them.

Q. Assertion :Two electrons in Helium are placed in only one shell while three electrons in Lithium occupy two shells. Reason: An orbit can have maximum

2 n^{2}

of electron so first orbital can have two electron only.

Q. Assertion :When the unshared pairs house in the hybrid orbitals, its consideration becomes accountable and it is referred to as hybrid lone pair moment. Reason: The hybrid orbital concentrated the electron cloud in some particular directions and the electron cloud remains under the control of a single nucleus.

Read the above assertion and reason and choose the correct option regarding it.

Electron occupies the available orbital singly before pairing in any one orbital occurs, it is

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