Chemistry: Hydrocarbon Cracking Processes
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Questions and Answers

Hydrocarbons can be cracked to produce ______ molecules.

smaller

Cracking involves heating the hydrocarbons to ______ them.

vaporise

Alkenes have the general formula ______.

CH2

The first 2 alkenes are ______ and propene.

<p>ethene</p> Signup and view all the answers

Alkenes react with bromine water, turning it from orange to ______.

<p>colourless</p> Signup and view all the answers

Some of the products made from cracking are useful as ______.

<p>fuels</p> Signup and view all the answers

The fractions from crude oil can be processed to produce fuels and feedstock for the _________ industry.

<p>petrochemical</p> Signup and view all the answers

Many of the fuels on which we depend for our modern lifestyle, such as petrol, diesel oil, kerosene, heavy fuel oil and liquefied petroleum gases, are produced from _________.

<p>crude oil</p> Signup and view all the answers

The shorter the molecules, the less ________ it is (more runny).

<p>viscous</p> Signup and view all the answers

The longer the molecules, the more ________ it is.

<p>viscous</p> Signup and view all the answers

The shorter the molecules, the lower the temperature at which that fraction is vaporised or condensed - and the lower its ________ point.

<p>boiling</p> Signup and view all the answers

Hydrocarbons are burnt so that they can be used as fuel, since the reaction produces ________.

<p>energy</p> Signup and view all the answers

Crude oil is a finite resource found in ______

<p>rocks</p> Signup and view all the answers

Crude oil is the remains of an ancient biomass consisting mainly of ______ that was buried in mud

<p>plankton</p> Signup and view all the answers

Most of the compounds in crude oil consist of molecules made up of ______ and carbon only (hydrocarbons)

<p>hydrogen</p> Signup and view all the answers

The first 4 alkanes are methane, ethane, propane and ______

<p>butane</p> Signup and view all the answers

Fractional distillation is a process used to separate the hydrocarbons in crude oil into ______

<p>fractions</p> Signup and view all the answers

The fractionating column works continuously, heated crude oil is piped in at the ______

<p>bottom</p> Signup and view all the answers

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