Polaris the north star is very bright and it doesn’t move
This reaction is called a composition reaction.
Answer:
An example of a phase is the final part of a multiple part landscaping project. An example of a phase is when you can the various shapes of the moon. An example of phase is a period of time during which you are a teenager when you fight with your parents all the time.
Explanation:
At its discovery, benzene was recognized to be a unique unsaturated hydrocarbon because it either failed to react, by substitution with common reagents or reacted by addition that led to reactions with alkenes.
<h3>What are unsaturated hydrocarbons?</h3>
Unsaturated hydrocarbons are the hydrocarbons which have at least on double or triple carbon to carbon bond in its molecules.
All other hydrocarbons are unsaturated except for the alkanes and the cyclic alkanes.
Benzene is an aromatic compound which has a special six-carbon ring with are resonance structure reflecting the presence of three carbon-carbon bonds in its molecules.
The common reactions of unsaturated hydrocarbons are substitution and addition reactions.
However, benzene on its discovery did not undergo any of these reactions.
In conclusion, benzene showed a difference when compared with the common unsaturated hydrocarbons as it did not undergo either substitution or addition reactions.
Learn more about benzene at: brainly.com/question/6028840
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