Alkenes
Muhtasari
While alkanes are the backbone of fuels, alkenes are the backbone of the chemical industry. Their carbon-carbon double bond makes them far more reactive, and this reactivity is what allows chemists to build plastics, make ethanol, and create countless everyday materials.
In this lesson you will learn the general formula for alkenes, why they are called unsaturated hydrocarbons, how to draw and name them, and how the bromine water test distinguishes them from alkanes.
Malengo
- 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 in the molecule, and name the unbranched-chain isomers
- Describe how bromine water can be used to distinguish between an alkane and an alkene
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Alkenes. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- The general formula for alkenes is: A) CnH2n+2 B) CnH2n C) CnH2n-2 D) CnHn+2 Answer: B
- Alkenes are described as unsaturated because they: A) Dissolve in water B) Contain only single bonds C) Contain a C=C double bond D) Are gases at room temperature Answer: C
- When ethene reacts with bromine water, the bromine water: A) Turns blue B) Stays orange C) Is decolourised D) Turns red Answer: C
- The reaction between an alkene and bromine is an example of: A) Combustion B) Decomposition C) Addition reaction D) Neutralisation Answer: C
- Which of these is the molecular formula for propene? A) C3H8 B) C3H6 C) C2H4 D) C4H8 Answer: B
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
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
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