Cracking & Alkenes (AQA GCSE Chemistry Combined Science): Quizzes

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Cracking & Alkenes
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What type of hydrocarbons are alkanes?

Saturated

What is the general formula for alkanes?

CnH2n+2C_nH_{2n+2}

What does it mean for alkanes to be saturated?

No double bonds in structure

What is the general formula for alkenes?

CnH2nC_nH_{2n}

What does it mean for alkenes to be unsaturated?

At least one C=C double bond

What is the purpose of cracking?

Break long hydrocarbons into shorter

What products can decane be cracked into?

Octane and ethene

What conditions are used in catalytic cracking?

High temp and a catalyst

What conditions are used in steam cracking?

Steam and high temp, no catalyst

Why is cracking essential?

Higher demand for shorter chains

Why are shorter hydrocarbons better fuels?

More flammable

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