Chapter 22, Problem 17STP

Interpretation Introduction

Interpretation: The type of reaction shown needs to be identified.

Concept Introduction: In a substitution reaction, one functional group is replaced by another functional group. In addition to reaction, two reactants simply add to form a single product. In a condensation reaction, the addition of two reactants takes place after the removal of the water molecule. The elimination reaction results when the removal of two substituent groups takes place from a molecule.

Answer to Problem 17STP

Correct Answer: Option (d)

Explanation of Solution

Reason for correct option: In the given reaction, prop-1-ene reacts with bromine molecule to form dibromopropane.

  

The given reaction results in the addition of two bromine atoms on an alkene. Here, Br in Br₂ molecule is halogen thus, the given reaction is a halogenations reaction. Therefore, option (d) is correct.

Conclusion

Reason for incorrect option:

In the condensation reaction, the addition of two reactants takes place with the removal of a side product. In dehydration, removal of a water molecule(s) takes place. In polymerization, monomer units combine to form a polymer. In a hydration reaction, a water molecule is added to a reactant to form a product. Thus, options (a), (b), (c) and (e) are incorrect.