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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Fuels

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Fuels

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Paper 3Theory (Core)1 marks

Fractional distillation of crude oil separates different hydrocarbons based on their properties.

Description

Properties of Petroleum Fractions

As crude oil is heated and passed through a fractionating column, various fractions are collected at different heights.

  1. a

    State the trend in boiling points of petroleum fractions from the bottom to the top of the column.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Fuels

Paper 3Theory (Core)6 marks

Description

Changes in Properties of Petroleum Fractions

Describe how the properties of petroleum fractions change as you move from the bottom to the top of a fractionating column.

  1. a

    Describe the changes in properties of petroleum fractions from the bottom to the top of the fractionating column.

    Aim for approximately 6 distinct marking points.

    [6]