Chapter 4: Carbon and Its Compounds

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Q
Carbon and Its Compound

Question:

Which of the following hydrocarbons undergo addition reactions: C2H6, C3H8, C3H6, C2H2, and CH4 ?

Answer:

The addition reaction is a type of reaction in which the unsaturated hydrocarbon is converted into saturated hydrocarbon by reacting with hydrogen gas in presence of nickel. This reaction is also called hydrogenation reaction.

C2H6, C3H8, and CH4 are the chemical formulae of ethane, propane, and methane respectively. So, a hydrogenation reaction will take place in these compounds because they are saturated hydrocarbon.

C3H6 is the chemical formula of propene. It is an unsaturated hydrocarbon and it undergoes hydrogenation to form propane.

C2H2 is the chemical formula of ethyne. It is an unsaturated hydrocarbon and it undergoes hydrogenation to form ethene, which can further hydrogenated to form ethane.

Therefore, only C3H6 and C2H2 can undergo an addition reaction.

 


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