Alkenes
Gbogbo ọrọ náà
Alkenes are the reactive cousins of alkanes. Their defining feature - a carbon-carbon double bond - makes them unsaturated and opens the door to addition reactions that alkanes simply cannot undergo.
In this lesson you will learn the general formula for alkenes, how to draw their structural and displayed formulae for up to four carbon atoms, why the C=C functional group makes them unsaturated, and how to use bromine water as a simple test to tell alkenes and alkanes apart.
Ebumnobi
- Know that alkenes contain the functional group C=C
- Know the general formula for alkenes
- Explain why alkenes are classified as unsaturated hydrocarbons
- Understand how to draw the structural and displayed formulae for alkenes with up to four carbon atoms
- Describe the reactions of alkenes with bromine to produce dibromoalkanes
- Describe how bromine water can be used to distinguish between an alkane and an alkene
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
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Kaadị ncheta
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Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Alkenes. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- The general formula for alkenes is: A) CnH2n+2 B) CnH2n C) CnH2n-2 D) CnHn Answer: B
- Alkenes are described as unsaturated because they contain: A) Only single bonds B) A carbon-carbon double bond C) A carbon-oxygen bond D) An OH group Answer: B
- When ethene reacts with bromine, the reaction type is: A) Substitution B) Combustion C) Addition D) Decomposition Answer: C
- Bromine water is decolorised by: A) Methane B) Propane C) Butane D) Ethene Answer: D
- Which is the simplest alkene? A) Methene B) Ethene C) Propene D) Butene Answer: B
Rue ajuju ndi a n'ime ngwa ahu
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Akwụkwọ A Na-atụ Aro
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Akụkụ akwụkwọ
Hydrocarbons
Explain the importance of hydrocarbons and the reason for their diversity
"Chemistry: Hydrocarbons" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/20-1-hydrocarbons. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Alkenes? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
