Alkanes
Akopọ
Alkanes are the simplest family of organic molecules and the backbone of the fossil fuel industry. From the methane that heats your home to the octane that powers a car, these compounds are everywhere in daily life, yet their chemistry is surprisingly straightforward once you grasp one idea: saturation.
In this lesson you will learn the general formula for alkanes, how to name and draw the first five members, why they are classified as saturated hydrocarbons, and how they react with halogens under ultraviolet light. These are core specification points that Edexcel revisits in both Paper 1 and Paper 2.
Awọn Afojusun
- know the general formula for alkanes
- explain why alkanes are classified as saturated hydrocarbons
- 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
- describe the reactions of alkanes with halogens in the presence of ultraviolet radiation, limited to mono-substitution knowledge of reaction mechanisms is not required
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Alkanes. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- What is the general formula for alkanes? A) CnH2n B) CnH2n+2 C) CnH2n-2 D) CnH2n+1OH Answer: B
- How many hydrogen atoms does pentane (C5H12) have? A) 10 B) 11 C) 12 D) 14 Answer: C
- Alkanes are described as saturated because they: A) Dissolve in water B) Contain only single C-C bonds C) Contain double bonds D) React with all reagents Answer: B
- What condition is needed for methane to react with chlorine? A) Heat B) A catalyst C) Ultraviolet radiation D) High pressure Answer: C
- The reaction of an alkane with a halogen in UV light is an example of: A) Addition B) Substitution C) Neutralisation D) Decomposition Answer: B
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Alkanes? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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