GCSE CHEMISTRY AQA 2 EXAM REVISION QUESTIONS WITH VERIFIED SOLUTIONS LATEST 2025 UPDATE.

GCSE CHEMISTRY AQA 2 EXAM REVISION QUESTIONS WITH
VERIFIED SOLUTIONS LATEST 2025 UPDATE.


Metal exraction - ANSWER- Potassium -> aluminium = electrolysis, Zinc -> copper =
extracted using carbon, Silver -> platinum = found native


Things that have a giant covalent structure: - ANSWER- Diamond, graphite, silicone dioxide,
silicone


Properties of simple molecular - ANSWER- Weak intermolecular forces, low melting point,
cumulative intermolecular forces, does not conduct electricity (except acids)


Properties of giant ionic - ANSWER- Regular lettuce of oppositely charged ions, high melting
point, conduct electricity when molten or in aqueous solutions


Properties of giant covalent - ANSWER- High melting points, conductivity varies



Properties of giant metallic - ANSWER- Malleable, ductile, conducts electricity



Properties of diamond - ANSWER- Pure form of carbon
Giant covalent structure
Tetrahedral bond arrangement
Very strong covalent bonds
No lines of weakness


Properties of graphite - ANSWER- Pure form of carbon
Giant covalent structure
Trigonal bond arrangement
Very high melting point

, Conducts electricity
Lubricant

High temp favours the... - ANSWER- Endothermic reaction



Low temp favours the... - ANSWER- Exothermic reaction



High pressure favours the side with the... - ANSWER- Fewest moles of gas



Low pressure favours the side with the... - ANSWER- Most moles of gas



Wire materials for flame test: - ANSWER- Nichrome/ platinum



Sodium hydroxide: Cu 2+ - ANSWER- Blue precipitate



Sodium hydroxide: Fe 2+ - ANSWER- Green precipitate



Sodium hydroxide: Fe 3+ - ANSWER- Brown precipitate



Sodium hydroxide: NH4 + - ANSWER- No precipitate, when heated ammonia gas produced



Flame test: Li + - ANSWER- Red flame



Flame test: Na + - ANSWER- Orange/yellow flame



Flame test: K + - ANSWER- Lilac flame



Flame test: Cu 2+ - ANSWER- Blue/green flame