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6.2 Organic chemistry

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Question 33

A chemist writes balanced equations for the complete combustion of four fuels. Each equation forms carbon dioxide and water, and has a coefficient of 1 in front of the fuel.

FuelFormula
PentaneC5H12\mathrm{C_{5}H_{12}}C5​H12​
ButaneC4H10\mathrm{C_{4}H_{10}}C4​H10​
But-1-eneC4H8\mathrm{C_{4}H_{8}}C4​H8​
Hex-1-eneC6H12\mathrm{C_{6}H_{12}}C6​H12​

Which fuel has a coefficient of 8 in front of O2\mathrm{O_{2}}O2​ in its balanced complete combustion equation?

[1]
A

But-1-ene, C4H8\mathrm{C_{4}H_{8}}C4​H8​

B

Hex-1-ene, C6H12\mathrm{C_{6}H_{12}}C6​H12​

C

Butane, C4H10\mathrm{C_{4}H_{10}}C4​H10​

D

Pentane, C5H12\mathrm{C_{5}H_{12}}C5​H12​

Markscheme

6.2 Organic chemistry Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Organic chemistry

131 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.

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