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#4 | Covalency
(Chemistry) > Chemical Bonding and Molecular Structure

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In an octahedral structure, the pair of d orbitals involved in d2sp3-hybridisation is:

1. dx2-y2, dz2

2. dxy, dx2-y2

3. dz2, dxz

4. dxy, dyz

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The number of sigma bonds in P4O10 is 

1. 6

2. 16

3. 20

4. 7

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Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

1. Cl> Br> F> I2

2. Br> I> F> Cl2

3. F> Cl> Br> I2

4. I> Br> Cl> F2

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Which one of the following molecules contain no π -bond?

1. CO2

2. H2O

3. SO2

4. NO2

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NEET - 2013
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The correct order of increasing bond length of 

C-H, C-O, C-C and C=C is

1. C-C<C=C<C-O<C-H

2. C-O<C-H<C-C<C=C

3. C-H<C-O<C-C<C=C

4. C-H<C=C<C-O<C-C

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NEET - 2011
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