Chapter 4, Problem 4.37SP

(a)

Interpretation Introduction

Interpretation:

More polar bond has to be predicted in the given pair.

$\text{C-H}\text{or C-Cl}$

Concept introduction:

Polarity:

Polarity is initiated by electronegativity difference between two bonded atoms.

Electronegativity:

Electronegativity is described as capable of atom to attract the shared electron towards itself.  If the atom has more electronegativity means sharing of electron will be unequal.  If the difference in electronegativity is large means an electrons will not be shared.  If atoms has same electronegativity means sharing of electron will be equal.

(b)

Interpretation Introduction

Interpretation:

More polar bond has to be predicted in the given pair.

$\text{Si-Li}\text{or Si-Cl}$

Concept introduction:

Polarity:

Polarity is initiated by electronegativity difference between two bonded atoms.

Electronegativity:

Electronegativity is described as capable of atom to attract the shared electron towards itself.  If the atom has more electronegativity means sharing of electron will be unequal.  If the difference in electronegativity is large means an electrons will not be shared.  If atoms has same electronegativity means sharing of electron will be equal.

(c)

Interpretation Introduction

Interpretation:

More polar bond has to be predicted in the given pair.

$\text{N-Cl}\text{or N-Mg}$

Concept introduction:

Polarity:

Polarity is initiated by electronegativity difference between two bonded atoms.

Electronegativity:

Electronegativity is described as capable of atom to attract the shared electron towards itself.  If the atom has more electronegativity means sharing of electron will be unequal.  If the difference in electronegativity is large means an electrons will not be shared.  If atoms has same electronegativity means sharing of electron will be equal.