Q33 of 68 Page 44

Explain the shape of BrF5.

In BrF5 the central atom is bromine which has the hybridization sp3d2.

Br atom has 7 valence electrons out of which 5 are used to make pair with the F atoms and two are used to make lone pair of electrons.


The lone pair and bond pair repel each other. Thus, the shape is square pyramidal.



The white balls are F atoms and the pink ball is Br atom.


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Explain the non linear shape of H2 S and non planar shape of PCl3 using valence shell electron pair repulsion theory.

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Using molecular orbital theory, compare the bond energy and magnetic character of O+2 and O-2 species.

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Structures of molecules of two compounds are given below :


(a) Which of the two compounds will have intermolecular hydrogen bonding and which compound is expected to show intramolecular hydrogen bonding.


(b) The melting point of a compound depends on, among other things, the extent of hydrogen bonding. On this basis explain which of the above two compounds will show higher melting point.


(c) Solubility of compounds in water depends on power to form hydrogen bonds with water. Which of the above compounds will form hydrogen bond with water easily and be more soluble in it.


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Why does type of overlap given in the following figure not result in bond formation?