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  4. According to VSEPR theory the repulsion between different pair (lone or bond) of electrons obey the order (I) lone pair-lone pair > lone pair-bond pair (II) lone pair-bond pair > bond pair-bond pair (III) lone pair-lone pair > bond pair-bond pair (IV) lone pair-bond pair > lone pair-lone pair

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Q. According to $VSEPR$ theory the repulsion between different pair (lone or bond) of electrons obey the order
(I) lone pair-lone pair $>$ lone pair-bond pair
(II) lone pair-bond pair $>$ bond pair-bond pair
(III) lone pair-lone pair $>$ bond pair-bond pair
(IV) lone pair-bond pair > lone pair-lone pair

J & K CETJ & K CET 2008Chemical Bonding and Molecular Structure

Solution:

According to the V SEP R theory, lone pairs of electrons occupy more space than bonding pairs. As a consequence, this is an order of the magnitude of repulsion.
$l p-l p>l p-b p>b p-b p$
Greatest repulsion is between 2 lone pairs.
Followed by repulsion between one lone pair and one bonding pair. The weakest repulsion is between 2 bonding pairs, the magnitude of repulsion between bonding pairs of electrons depends on the $EN$ difference between a central atom and the other atoms.