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Question

Out of given reaction which show change in hybridisation of central atom?

A
H3BO3 dissolve in water
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B
H2SO4 dissolve in water
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C
N2O5(g)N2O5(s)
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D
PBr5(g)PBr5(s)
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E
C2H6Homolytic−−−−−−−−−−−−−−−bondcleavageofCCbond
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Solution

The correct options are
A H3BO3 dissolve in water
C N2O5(g)N2O5(s)
D C2H6Homolytic−−−−−−−−−−−−−−−bondcleavageofCCbond
E PBr5(g)PBr5(s)
(A) When H2BO3 dissolves in water, the hybridization changes.
H2BO3+H2OHBO23+H3O+
(C) In the gas phase, nitrogen pentoxide exists as N2O5.
in solid phase, it exists as [NO2]+[NO3]
Hence, in the transformation N2O5(g)N2O5(s) the oxidation state changes.
(D) In the gas phase, phosphorus pentabromide exists as PBr5.
in solid phase, it exists as [PBr4]+Br
Hence, in the transformation PBr5(g)PBr5(s) the oxidation state changes.
(E) In the transformation C2H6Homolytic−−−−−−−−−−−−−−−bondcleavageofCCbond
the hybridization changes from sp3 to sp2

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