Chapter 2, Problem 2D.14E

(a)

Interpretation Introduction

Interpretation:

The bond length of $\text{N}-\text{O}$ in $\text{NO}$, ${\text{NO}}_2$ and ${\text{NO}}_3{}^{-}$ has to be placed in order of decreasing bond length.

Concept Introduction:

The dissociation energy is a parameter that allows one to estimate the strength of bond formed. It is essentially the energy required to cleave and separate two atoms. It varies with several factors such as size, multiplicity, and number of unshared electron pairs. If the size of atoms is large bond strength is weak, consequently bond length is more compared to bond formed between smaller atoms. If bond is higher-order as in case of double or triple bond the dissociation energy also increases as bond becomes strong. Such strong multiple bonds have smaller bond length because bond strength varies inversely to bond length.

(b)

Interpretation Introduction

Interpretation:

The bond length of $\text{C}-\text{C}$ in ${\text{C}}_2{\text{H}}_{\text{2}}$, ${\text{C}}_2{\text{H}}_4$ and ${\text{C}}_2{\text{H}}_6$ has to be placed in order of decreasing bond length.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The bond length of $\text{C}-\text{O}$ in ${\text{CH}}_{\text{3}}\text{OH}$, ${\text{CH}}_2\text{O}$ and ${\text{CH}}_{\text{3}}{\text{OCH}}_{\text{3}}$ has to be placed in order of decreasing bond length.

Concept Introduction:

Refer to part (a).