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

MEDIUM

11th CBSE

IMPORTANT

Earn 100

Explain why ${B e H}_{2}$ molecule has a zero-dipole moment although the $Be - H$ bonds are polar.

Important Questions on Chemical Bonding and Molecular Structure

MEDIUM

11th CBSE

IMPORTANT

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?

MEDIUM

11th CBSE

IMPORTANT

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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11th CBSE

IMPORTANT

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}^{-}

MEDIUM

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.26

Is there any change in the hybridisation of

B

and

N

atoms as a result of the following reaction?

B F_{3} + N H_{3} \to F_{3} B . N H_{3}

MEDIUM

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.27

Draw diagrams showing the formation of a double bond and a triple bond between carbon atoms in

C_{2} H_{4}

and

C_{2} H_{2}

molecules.

EASY

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.28

What is the total number of sigma and pi bonds in the following molecule?

$C_{2} H_{2}$

MEDIUM

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.28

What is the total number of sigma and pi bonds in the following molecule?

$C_{2} H_{4}$

EASY

11th CBSE

IMPORTANT

Textbook for Class XI Chemistry Part I>Chapter 4 - Chemical Bonding and Molecular Structure>EXERCISES>Q 4.29

Considering $x$ -axis as the internuclear axis, which out of the following will not form a sigma bond and why?

(a) $1 s$ and $1 s$ (b) $1 s and 2 p_{x}$ (c) $2 p_{y} and 2 p_{y}$ (d) $1 s and 2 s$ .