In relation to alkenes, which of the following statements is correct? 1. They all contain double bonds. 2. They can all be reduced to alkanes. 3. Aromatic compounds are also alkenes as they contain double bonds. A. Only 1 B. Only 2 C. Only 3 D. 1 and 2 E. 2 and 3
Question
In relation to alkenes, which of the following statements is correct?
- They all contain double bonds.
- They can all be reduced to alkanes.
- Aromatic compounds are also alkenes as they contain double bonds. A. Only 1 B. Only 2 C. Only 3 D. 1 and 2 E. 2 and 3
Solution
The correct answer is D. 1 and 2.
Here's why:
-
Alkenes are hydrocarbons that contain at least one carbon-carbon double bond, so statement 1 is correct.
-
Alkenes can indeed be reduced to alkanes. This is typically done through a reaction with hydrogen in the presence of a catalyst, so statement 2 is also correct.
-
Aromatic compounds, while they do contain double bonds, are not considered alkenes. This is because they have a special type of bonding that involves a ring of electrons that is delocalized, or spread out over several atoms. This gives them different properties from alkenes, so statement 3 is incorrect.
Similar Questions
Which of the following statements about alkenes is not correct?A. They have reactive double bonds.B. They can form addition polymers.C. They react mainly by substitution.D. They can react with water to form alcohols.
Alkene hydrocarbon molecules have to contain what types of bonds?Question 5Select one:a.double bondsb.triple bondsc.ionic bondsd.single bonds
The alkenes are unsaturated hydrocarbons. They form a homologous series, the members ofwhich have the same chemical properties.They undergo addition reactions and are easily oxidised.(a) The following hydrocarbons are isomers.CH 3 CH CH CH 2CH 3CH 3 CH 2 CH 2 CH CH 2(i) Explain why these two hydrocarbons are isomers................................................................................................................................................................................................................................................................... [2](ii) Give the structural formula of another hydrocarbon which is isomeric with the above.[1](b) Give the structural formula and name of each of the products of the following additionreactions.(i) ethene and brominestructural formula of productname of product ................................................................................................... [2](ii) propene and hydrogenstructural formula of productname of product ................................................................................................... [2](iii) but-1-ene and waterstructural formula of productname of product ................................................................................................... [2]PhysicsAndMathsTutor.com
Alkanes and alkenes are both series of hydrocarbons.(a) (i) Explain the term hydrocarbon................................................................................................................................................................................................................................................................... [1](ii) What is the difference between these two series of hydrocarbons?..............................................................................................................................................................................................................................................
Multiple Choice QuestionThe term alkane is used to describe hydrocarbons that contain ______.Multiple choice question.only C–C single bondsonly C–H single bondsonly H–H single bondsonly C–C and C–H single bonds
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.