Science Single Award - 4SS0 PearsonEdexcel

Alkanes

Muhtasari

Alkanes are the simplest organic molecules - chains of carbon atoms bonded to nothing but hydrogen. They burn well, which makes them excellent fuels, but they are otherwise remarkably unreactive. Natural gas, petrol, and candle wax are all alkanes.

In this lesson you will learn the general formula for alkanes, why they are called saturated hydrocarbons, and how to draw and name the first five members of the series. You will also explore their combustion reactions and physical property trends.

Malengo

  1. Know the general formula for alkanes
  2. Explain why alkanes are classified as saturated hydrocarbons
  3. Understand how to draw the structural and displayed formulae for alkanes with up to five carbon atoms in the molecule, and to name the unbranched-chain isomers

Maelezo ya Somo

Light a gas hob and you are burning methane. Fill a car with petrol and you are using octane. Strike a match and the wax tip contains long-chain alkanes. These molecules are everywhere because they are the backbone of fossil fuels and the starting point for much of organic chemistry.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Alkanes. 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.

  1. The general formula for alkanes is: A) CnH2n B) CnH2n+2 C) CnH2n-2 D) CnHn+2 Answer: B
  2. Alkanes are described as saturated because they: A) Contain double bonds B) Dissolve in water C) Contain only single carbon-carbon bonds D) Are very reactive Answer: C
  3. The products of complete combustion of an alkane are: A) Carbon monoxide and water B) Carbon dioxide and water C) Carbon and water D) Carbon dioxide and hydrogen Answer: B
  4. Which alkane has 3 carbon atoms? A) Methane B) Ethane C) Propane D) Butane Answer: C
  5. As alkane chain length increases, the boiling point: A) Decreases B) Stays the same C) Increases D) Fluctuates Answer: C

Inapatikana kwenye programu ya Green Bridge

Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.

Maelezo kamili ya masomo yenye michoro
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Soma bila mtandao, wakati wowote, mahali popote
Inapatikana kwa Android, Windows, macOS, na Linux

Inapatikana kwenye programu ya Green Bridge

Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.

Maelezo kamili ya masomo yenye michoro
Msaidizi wa kujifunza wa AI
Soma bila mtandao, wakati wowote, mahali popote
Inapatikana kwa Android, Windows, macOS, na Linux

Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Alkanes? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

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