An unknown compound dissolves in sulphuric acid, but does...

An unknown compound dissolves in sulphuric acid, but does not decolourize bromine water and does not react with sodium. Which of the following classes of molecules behave in this manner?
(a) phenol
(b) alkene
(c) alcohol
(d) ether

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Key Concepts

Organic Functional Groups

This concept involves the study of distinct groups of atoms within molecules that determine their characteristic chemical reactions. Understanding functional groups—such as hydroxyl, ether, alkene, and aromatic groups—is crucial for predicting how a compound will react under various conditions.

Acid-Base Behavior in Organic Chemistry

This concept covers how organic compounds interact with acids and bases, including their solubility and protonation. It explains why some compounds dissolve in strong acids by forming protonated species without undergoing further chemical transformations.

Electrophilic Addition Reactions

This concept refers to the mechanism by which compounds with unsaturated bonds (like alkenes) react with electrophiles such as halogens. It is a key reaction used to identify unsaturation in molecules and to understand reactivity patterns in organic chemistry.

Reactivity with Metals

This concept explains how organic compounds containing acidic hydrogen atoms, typically found in hydroxyl groups, react with active metals. Such reactions usually result in the formation of metal alkoxides along with the release of hydrogen gas, serving as a diagnostic reaction for the presence of reactive hydrogen.

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