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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Fuels

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Fuels

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Paper 3Theory (Core)4 marks

The process of fractional distillation is used in the oil industry to separate crude oil into various useful products.

Description

Fractional Distillation of Crude Oil

Crude oil is heated in a distillation column, where it vaporizes and rises. Different hydrocarbons condense at different heights based on their boiling points, allowing for the collection of various fractions.

  1. a

    Explain the process of fractional distillation and its significance in petroleum refining.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Fuels

Paper 3Theory (Core)2 marks

Description

Separation of Crude Oil

The distillation column operates by heating crude oil, allowing it to vaporize and separate into fractions based on boiling points.

  1. a

    Describe the role of boiling points in the fractional distillation of crude oil.

    Aim for approximately 2 distinct marking points.

    [2]