Unsaturated hydrocarbons usually undergo which of the following reaction mechanisms?
Addition
Unsaturated hydrocarbons (alkenes and alkynes) contain carbon–carbon double or triple bonds. The pi bonds in these multiple bonds are electron-rich and relatively reactive, so small molecules such as H2, X2, HX or H2O can add across the double or triple bond, converting it into a single bond.
This addition mechanism is the characteristic reaction of alkenes and alkynes (for example CH2=CH2 + Br2 → CH2BrCH2Br). Combustion is common to almost all hydrocarbons and not specific, substitution is the hallmark reaction of saturated alkanes, and neutralisation is an acid–base reaction that hydrocarbons do not undergo.
Hence, the answer is Addition.
Similar Questions
What do methane, ethane and propane represent in the study of carbon compounds?
Which property is most affected if the length of the carbon chain in an alkane increases?
Which among the following molecular formulae of organic compounds does NOT represent a ring structure?
Why do higher homologues of alkanes produce multiple products when they react with chlorine in a substitution reaction?
Select the correct option regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): Unsaturated hydrocarbons give a yellow flame with black smoke.
Reason (R): They burn completely when oxygen is insufficient.
Which of the following statements about a homologous series are CORRECT?
(1) All members have the same general formula.
(2) Each successive member differs by a \(-CH_2-\) group.
(3) Physical properties remain identical for all members.
Which of the following hydrocarbons undergo addition reactions with hydrogen?
A compound has the molecular formula C4H10. Which statement best describes its structure?
Which of the following is NOT a characteristic of substitution reactions in alkanes?
What sort of flame is produced when unsaturated carbon compounds are burnt in air?
Important Questions from Hydrocarbons
Which of the following base is found in soap?
Which one of the following is the general formula of Alkenes?
- \({\rm{C}}{{\rm{H}}_3}{\rm{COOH}}\mathop \to \limits^{LiAI{H_4}} {\rm{A}}\mathop \to \limits^{PC{I_5}} {\rm{B}}\mathop \to \limits^{alc.KOH} {\rm{C}}\) Homologue of ‘C’ in the above reaction is:
Maximum quantity of carbon is present in
Which of the following pair gives 1° carbonium ion by hydrolysis of C-Br bond?
