Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.17

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Define electronegativity. How does it differ from electron gain enthalpy ?

Important Questions on Chemical Bonding and Molecular Structure

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.18

Explain with the help of suitable example polar covalent bond.

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.19

Arrange the bonds in order of increasing ionic character in the molecules:

LiF, K_{2} O, N_{2}, {SO}_{2}

and

{C l F}_{3}

.

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.2

The skeletal structure of

{C H}_{3} C O O H

, as shown below is correct, but some of the bonds are shown incorrectly. Write the correct Lewis structure for acetic acid.
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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.21

Apart from tetrahedral geometry, another possible geometry for

{C H}_{4}

is square planar with the four

H

atoms at the corners of the square and the

C

atom at its centre. Explain why

{C H}_{4}

is not square planar ?

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.22

Explain why

{B e H}_{2}

molecule has a zero-dipole moment although the

Be - H

bonds are polar.

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.23

Which out of

{N H}_{3}

and

{N F}_{3}

has a higher dipole moment and why?

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.24

What is meant by hybridisation of atomic orbitals? Describe the shapes of

sp, {sp}^{2}, {sp}^{3}

hybrid orbitals.

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Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.25

Describe the change in hybridisation (if any) of the

A l

atom in the following reaction.

AlC l_{3} + C l^{-} \to AlC l_{4}^{-}