GCSE Edexcel Chemistry Combined Science Homologous series: Crude oil is found in the Earth’

Question

Crude oil is found in the Earth’s crust.

(a) Which of the statements about crude oil is correct?

A crude oil is a finite resource
 B crude oil is a mixture of the elements hydrogen and carbon
 C all of the molecules in crude oil contain rings of carbon atoms
 D crude oil is used in cars as a fuel

(b) The substances ethane, C₂H₆, octane, C₈H₁₈, and pentadecane, C₁₅H₃₂, are all found in crude oil.

These substances

A have the same formula
 B have the same boiling point
 C are in the same homologous series
 D form different products when completely combusted in air

(c) (i) Use a word from the box to complete each of the sentences about the fractional distillation of crude oil.

Each word may be used once, more than once, or not at all.

condensed
 heated
 melted
 solidified
 stirred

The separation of crude oil into fractions occurs in a fractional distillation column.

Before crude oil is passed into the column it is ________________________________.

During the distillation, vapor rises up the column until it is cold enough for the vapour to form a liquid. The vapour has been ________________________________.

Crude oil is found in the Earth’s crust - Edexcel - GCSE Chemistry Combined Science - Question 3 - 2018 - Paper 1

Worked Solution & Example Answer:Crude oil is found in the Earth’s crust - Edexcel - GCSE Chemistry Combined Science - Question 3 - 2018 - Paper 1

Which of the statements about crude oil is correct?

The substances ethane, octane, and pentadecane are all found in crude oil. These substances

Use a word from the box to complete each of the sentences about the fractional distillation of crude oil. Before crude oil is passed into the column it is

Use a word from the box to complete each of the sentences about the fractional distillation of crude oil. The vapour has been

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