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#alkenes

7 public questions tagged with this topic.

Which of the following alkenes shows cis-trans isomerism?

Alkenes with different groups attached to the doubly bonded carbon atoms exhibit cis-trans isomerism. 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 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.