A car advert says:
"Our hydrogen fuel cell car causes no carbon dioxide emissions at all."
Which is the best evaluation of this claim?
The claim is correct, because the only product of the fuel cell reaction is water.
The claim is wrong, because the fuel cell reaction makes carbon dioxide as well as water.
The claim is misleading, because the oxygen used in the fuel cell is made by burning fossil fuels.
The claim is misleading. No carbon dioxide comes from the car, but carbon dioxide may be released when the hydrogen is made.
63 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.