Chapter 12, Problem 58P

(a)

Interpretation Introduction

Interpretation:The molecular formula of the phenyl group is

${\text{C}}_{\text{6}}{\text{H}}_{\text{5}}\text{-}$ and the symbol is $\text{Ph-}$ should be stated as true or false.

Concept Introduction:The molecular formula represents chemical symbols for the elements present in the molecule and numeric subscripts present after chemical symbol represents the number of atoms of each element in the molecule.

(b)

Interpretation Introduction

Interpretation:The positions occupied by para substituents are on adjacent carbons on a benzene ring should be stated as true or false.

Concept Introduction: For a disubstituted benzene ring, there are possibilities of three isomers.

The prefixes used in organic chemistry for disubstituted benzene are ortho-, meta-, and para- which are used to indicate the position of substituent (non-hydrogen) on benzene.

(c)

Interpretation Introduction

Interpretation:The separation of 4-bromobenzoic acid can be done into cis and trans isomers should be stated as true or false.

Concept Introduction: Geometric isomerism, or cis-trans, isomerism is most common in alkenes. The two forms exist due to no free rotation about carbon-carbon double bond. It exists only when the double bonded carbon atoms are joined to two different groups or atoms.