Skip to content

Course home

Atoms and reactions

Easy Medium Hard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Question 12

Potassium ferrate, $K2FeO4\text{K}_2\text{FeO}_4$ , is a powerful oxidising agent used in wastewater treatment. What is the oxidation number of iron ( $Fe\text{Fe}$ ) in $K2FeO4\text{K}_2\text{FeO}_4$ ?

A

$+ 3$

B

$+ 6$

C

$+ 4$

D

$+ 2$

Markscheme

Atoms and reactions Questions

A Level
Chemistry
Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank