Write the word equation for an example of cracking CH 3 CH 2 8 CH 3 → heat Al 2 O 3 CH 3 CH 2 4 CH 3 + CH 2 = CH - CH 2 - CH 3

An example of a cracking reaction is, when decane is heated in presence of aluminium oxide, it decomposes to form hexane and butene. CH 3 CH 2 8 CH 3 → heat Al 2 O 3 CH 3 CH 2 4 CH 3 + CH 2 = CH - CH 2 - CH 3 The word equation for the given reaction can be written as; Decane → Heat Al 2 O 3 Hexane + Butene

Electrophiles are the species that are electron deficient, and hence they bear positive charge. These react with nucleophiles and accept a pair of electrons. Examples of electrophiles are H 3 O + , BF 3 , AlCl 3 , F 2 , etc.

E M B I B E

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 4

EASY

AS and A Level

IMPORTANT

Earn 100

Name the first member of homologous series of alkenes.

Important Questions on Hydrocarbons

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 4

Give the molecular formula of alkene containing

18

carbon atoms and one

C = C

bond.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 4

Write the word equation for an example of cracking ${CH}_{3} {({CH}_{2})}_{8} {CH}_{3} \to_{heat}^{{Al}_{2} O_{3}} {CH}_{3} {({CH}_{2})}_{4} {CH}_{3} + {CH}_{2} = CH - {CH}_{2} - {CH}_{3}$

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 4

Write a balanced equation to show the cracking of nonane into heptane and ethene.

MEDIUM

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 4

Discuss and suggest why 'alkenes are more reactive than alkanes'. Think about whether electrophiles or nucleophiles would attack alkenes and explain your choice.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 5

State the general condition used in the reaction between an alkene and hydrogen.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 15 - Hydrocarbons>Question>Q 5

Name the product formed when propene reacts with chlorine.

MEDIUM

AS and A Level