D: SiO₂
Oracle Prep sorts past-paper questions by topic, so you can drill Chemical periodicity 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
Which oxide is insoluble in aqueous sodium hydroxide?
X, Y and Z are three elements in the third period. • X reacts with chlorine to give a liquid product. • Y reacts with…
Complete the electronic configuration of a chromium atom. 1s²2s²2p⁶3s²
In which different forms does nitrogen exist in compounds? 1 bonded by a triple covalent bond 2 as part of a cation 3…
Poly(ethene) and PVC are examples of addition polymers. Which statements are correct? 1 On combustion, PVC can produc…
Organic compound X gives a precipitate when warmed with aqueous silver nitrate. This precipitate dissolves when conce…