Some statements about valence bond theory are given below
   i) The strength of bond depends upon extent of overlapping.
   ii) The theory explains the directional nature of covalent bond.
   iii) According to this theory oxygen molecule is paramagnetic in nature.

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all are correct

only i and iii are correct

only i and ii are correct

all are wrong

answer is C.

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Detailed Solution

According to VBT

(i) Greater the extent of overlapping of orbitals, stronger the band(i) is true

(ii) Direction of the bond will be in the direction of the overlapping orbitals(ii) is correct

(iii) VBT cannot explains Paramagnetic behaviour of O₂ (iii) is false

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