A: both 1 and 2
Oracle Prep sorts past-paper questions by topic, so you can drill Chemical bonding and see which topics are most likely to come up next.
Sign up free →Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content
After black and white photographic film has been developed, unreacted silver bromide is removed by reaction with sodi…
Which molecules have an overall dipole moment? 1 carbon monoxide, CO 2 phosphine, PH₃ 3 carbon dioxide, CO₂
The electrical conductivities of two compounds, Y and Z, are shown in the table. conductivity of the compound in the …
The equation for a chemical reaction is shown. All substances are in their standard states. XeF₆ + 3H₂O → XeO₃ + 6HF …
Acidified potassium manganate(VII) reacts with iron(II) ethanedioate, FeC₂O₄. The reactions taking place are shown. M…
When copper is added to a solution of silver ions, the following equilibrium is established. Cu(s) + 2Ag⁺(aq) ⇌ Cu²⁺(…