WorksheetsChem-is-try Challenge 20
Total questions: 8
Worksheet time: 16mins
The following oxides have similar acid-base properties as aluminium oxide except
B2O3
BeO
GeO
SnO2
Mg(OH)2 is thermally more stable than MgCO3. Which is true about this statement?
OH- ion is bigger than CO22- ion
OH- ion is less polarisable than CO32- ion
Enthalpy of formation of Mg(OH)2 is more negative than that of MgCO3
The ionic bond of Mg(OH)2 is stronger than that of MgCO3
Which statement is NOT true about both beryllium and aluminium compounds?
Both salt solutions are acidic
Both chlorides form dimers
Both oxides are amphoteric
Both complexes are octahedral
Which causes tin and lead to have low melting points among Group 14 elements of the Periodic Table?
Bigger atomic radii
Lattice structure
Weak metallic bond
Inert pair effects
Carbon is the first element while lead is the last element in Group 14 of the Periodic Table. Both form tetrachlorides. Which is true about these tetrachlorides?
Non-polar
Thermally stable
Volatile
React with water
The reaction of chlorine with an aqueous solution of potassium hydroxide gives different products under different conditions. Which statement is true about the reaction?
Cl2 acts as an oxidising and reducing agent
KClO3 is formed at 00C
KClO3 undergoes disproportionation when heated
KClO is more stable than KClO3
What happens when distilled water is added to a concentrated solution of tetrachlorocuprate(II) ion?
A tetrahedral complex ion is formed
Tetrahydroxocuprate(II) ion is formed
The colour of the solution changes from yellow to blue
A blue precipitate of copper(II) hydroxide is deposited
X is a suitable material used to build aircraft jet engines because it has a low density and high resistance to corrosion. X is
carbon fibre
tin
chromium
titanium
