Q.
According to valence bond theory, water molecule has
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a
Two dative bonds and bond angle 90°
b
Two covalent bonds and bond angle 90°
c
Two dative bonds and bond angle 104.5°
d
Two covalent bonds and bond angle 104.5°
answer is B.
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Detailed Solution
According to the VBT ,the covalent bond is formed by the overlapping of pure atomic orbitals having unpaired electrons of valency shell of the atoms.8O : 1s2 2s2 2px2 2py2 2pz1In H2O,the "O" atom in its valency shell contains 2-unpaired electrons in two p-orbitals, those two p-orbitals are perpendicular to each other [i.e., 90° to each other], those two p-orbitals forms the two covalent bonds with two half filled s-orbitals of hydrogen atoms with an angle of 90°.
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