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#hydrocarbons

9 public questions tagged with this topic.

Which of the following hydrocarbons does not undergo addition reactions?

Aromatic hydrocarbons, such as benzene, do not readily undergo addition reactions. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.

Which among the following hydrocarbons is most reactive?

Alkynes are more reactive than alkenes and alkanes due to the presence of a triple bond. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.

Which of the following hydrocarbons does not undergo Markovnikov’s addition of HBr?

Alkynes follow Markovnikov’s rule in the absence of peroxides, but propene follows anti-Markovnikov addition in the presence of peroxides. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.

Which reaction is used for the laboratory preparation of ethene?

Dehydration of ethanol using concentrated H₂SO₄ at 443 K gives ethene. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.