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Cis-trans and Markovnikov (exam) — Cis-trans
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. This page separates the idea from the wider topic “CIS-TRANS AND MARKOVNIKOV (EXAM)” so it can be revised and assessed on its own.
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Cis-trans and Markovnikov (exam) — Cis-trans
What is it?
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. This page separates the idea from the wider topic “CIS-TRANS AND MARKOVNIKOV (EXAM)” so it can be revised and assessed on its own.
In simple words
- Ethene no (two H on each C).
- But-2-ene
- Exam link: check both carbons.
Important terms
CIS-TRANS: Ethene no (two H on each C).
CIS-TRANS AND MARKOVNIKOV (EXAM): Cis-trans: two different groups on each C of C=C.
What you should learn
- Define cis-trans using accurate chemistry terms.
- Explain why cis-trans matters within cis-trans and markovnikov (exam).
- Apply the learning unit to an FBISE-style example, comparison, diagram, or calculation.
Examples
- But-2-ene
- Maleic/fumaric named if asked
- No rotation
KEY IDEA
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition.
EXAM APPLICATION
Worked propene + HBr: H to the CH2 end (already two H) Br to the middle carbon major name: 2-bromopropane
Recommended for Class 11
Full school-level explanation
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. This page separates the idea from the wider topic “CIS-TRANS AND MARKOVNIKOV (EXAM)” so it can be revised and assessed on its own.
Study this learning unit in three steps:
WHAT — CIS-TRANS AND MARKOVNIKOV (EXAM) — CIS-TRANS
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. This page separates the idea from the wider topic “CIS-TRANS AND MARKOVNIKOV (EXAM)” so it can be revised and assessed on its own.
WHY — Why this topic matters
CIS-TRANS AND MARKOVNIKOV (EXAM) — CIS-TRANS is an independent FBISE learning unit because students must use its definitions, conditions, equations, or trends separately in explanations and calculations.
HOW — How it works
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. Examples: But-2-ene; Maleic/fumaric named if asked; No rotation. Exam use: Worked propene + HBr: H to the CH2 end (already two H) Br to the middle carbon major name: 2-bromopropane
KEY IDEA
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition.
Remember
- check both carbons
Examples
- But-2-ene
- Maleic/fumaric named if asked
- No rotation
EXAM APPLICATION
Worked propene + HBr: H to the CH2 end (already two H) Br to the middle carbon major name: 2-bromopropane
Remember
- 2-bromopropane
Examples
- But-2-ene
- Maleic/fumaric named if asked
- No rotation
Remember
- check both carbons
- 2-bromopropane
- Federal Board only
- check both carbons
- 2-bromopropane
- check both carbons
- independent learning unit
- check both carbons
How the ideas connect
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. Examples: But-2-ene; Maleic/fumaric named if asked; No rotation. Exam use: Worked propene + HBr: H to the CH2 end (already two H) Br to the middle carbon major name: 2-bromopropane
Deeper understanding
Go beyond memorising Cis-trans and Markovnikov (exam) — Cis-trans. Connect the definition to reasons, relationships, exceptions, and exam wording.
How the ideas connect
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C with more H already (rich get richer) for HX addition. Examples: But-2-ene; Maleic/fumaric named if asked; No rotation. Exam use: Worked propene + HBr: H to the CH2 end (already two H) Br to the middle carbon major name: 2-bromopropane
Common mistakes
Exam focus
Core idea
WHAT
WHY
HOW
Exam focus
Quick revision
- check both carbons
- 2-bromopropane
- Federal Board only
- CIS-TRANS: Ethene no (two H on each C).
- CIS-TRANS AND MARKOVNIKOV (EXAM): Cis-trans: two different groups on each C of C=C.
- WHAT — CIS-TRANS AND MARKOVNIKOV (EXAM) — CIS-TRANS: Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book us
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
For long answers on Cis-trans and Markovnikov (exam) — Cis-trans: define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- check both carbons
- 2-bromopropane
- Federal Board only
- CIS-TRANS: Ethene no (two H on each C).
Important formulas
- check both carbons
- 2-bromopropane
- Federal Board only
Common exam traps
- Do not treat cis-trans as the same as every other part of cis-trans and markovnikov (exam); define this unit and use its own evidence, steps, or conditions.
- Do not memorise a label alone; connect the definition to a process, structure, condition, equation, or example.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Do not treat cis-trans as the same as every other part of cis-trans and markovnikov (exam); define this unit and use its own evidence, steps, or conditions.
- Mistake
Do not memorise a label alone; connect the definition to a process, structure, condition, equation, or example.
- Mistake
Do not use provincial-board wording or add material outside the Federal Board Class 11 scope.
- Mistake
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
check both carbons
2-bromopropane
Federal Board only
CIS-TRANS: Ethene no (two H on each C).
Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C w
- Definition
- Ethene no (two H on each C). Propene no (CH2 end has two H). But-2-ene yes. EZ named if the book uses CIP, else cis-trans is enough. Markovnikov: H adds to C w
- Example
- But-2-ene
- Critical warning
- Do not treat cis-trans as the same as every other part of cis-trans and markovnikov (exam); define this unit and use its
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Exam Practice
Define
Q1. Define Cis-trans and Markovnikov (exam) — Cis-trans.
Explain
Q2. Explain: KEY IDEA.
Example
Q3. Give one clear example of Cis-trans and Markovnikov (exam) — Cis-trans and say why it fits.
Mistake
Q4. State one common mistake students make about Cis-trans and Markovnikov (exam) — Cis-trans.
Exam note
Q5. Write a short exam note on Cis-trans and Markovnikov (exam) — Cis-trans: definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.