AQA A Level Chemistry- Inorganic
chemistry comprehensive Questions and
Answers with Verified Solutions
Question 1:
Periodic table
Answer:
Table that provides chemists with a structural organisation of the known
chemical elements that can be used to deduce physical and chemical
properties
Question 2:
Atomic radius across Period 3
Answer:
Decreases
Question 3:
First ionisation energy across Period 3
Answer:
Increases Exceptions: Drops at Al and S
Question 4:
Melting points across Period 3
Answer:
Increases from Na to Si Decreases from Si to Ar Small rise at S
,Question 5:
Explain why the melting point of aluminium is higher than the melting
point of sodium
Answer:
Bigger charge (3+ compared to 1+) More free/delocalised electrons
Stronger metallic bonding/stronger (electrostatic) attraction between the
ions electrons
Question 6:
Explain why the melting point of sulfur is higher than the melting point of
phosphorus
Answer:
S bigger molecule So more/stronger van der Waals' forces (to be broken
or overcome)
Question 7:
Atomic radius down Group 2
Answer:
Increases
Question 8:
First ionisation energy down Group 2
Answer:
Decreases
Question 9:
Melting point down Group 2
Answer:
Decreases Exception Ca which increases
, Question 10:
Explain the melting point of the elements in terms of the structure and
bonding of Group 2 elements
Answer:
Be and Mg have hexagonal close packed structures Ca, Sr and Ba have
cubic structures
Question 11:
The relative solubilities of the hydroxides, X(OH)2, of the elements Mg-Ba
in water
Answer:
Increase down the group
Question 12:
The relative solubilities of the sulfates, XSO4, of the elements Mg-Ba in
water
Answer:
Decrease down the group
Question 13:
The role of magnesium in the extraction of titanium from TiCl4
Answer:
Mg is used as a reducing agent Mg is oxidised to 2+ in MgO when it is
heated with TiCl4 to about 1200C in an inert atmosphere
Question 14:
Redox equation of Group 2 elements with water
Answer:
X(s) + 2H2O(l) -> X2+(aq) +2OH-(aq) + H2(g)
chemistry comprehensive Questions and
Answers with Verified Solutions
Question 1:
Periodic table
Answer:
Table that provides chemists with a structural organisation of the known
chemical elements that can be used to deduce physical and chemical
properties
Question 2:
Atomic radius across Period 3
Answer:
Decreases
Question 3:
First ionisation energy across Period 3
Answer:
Increases Exceptions: Drops at Al and S
Question 4:
Melting points across Period 3
Answer:
Increases from Na to Si Decreases from Si to Ar Small rise at S
,Question 5:
Explain why the melting point of aluminium is higher than the melting
point of sodium
Answer:
Bigger charge (3+ compared to 1+) More free/delocalised electrons
Stronger metallic bonding/stronger (electrostatic) attraction between the
ions electrons
Question 6:
Explain why the melting point of sulfur is higher than the melting point of
phosphorus
Answer:
S bigger molecule So more/stronger van der Waals' forces (to be broken
or overcome)
Question 7:
Atomic radius down Group 2
Answer:
Increases
Question 8:
First ionisation energy down Group 2
Answer:
Decreases
Question 9:
Melting point down Group 2
Answer:
Decreases Exception Ca which increases
, Question 10:
Explain the melting point of the elements in terms of the structure and
bonding of Group 2 elements
Answer:
Be and Mg have hexagonal close packed structures Ca, Sr and Ba have
cubic structures
Question 11:
The relative solubilities of the hydroxides, X(OH)2, of the elements Mg-Ba
in water
Answer:
Increase down the group
Question 12:
The relative solubilities of the sulfates, XSO4, of the elements Mg-Ba in
water
Answer:
Decrease down the group
Question 13:
The role of magnesium in the extraction of titanium from TiCl4
Answer:
Mg is used as a reducing agent Mg is oxidised to 2+ in MgO when it is
heated with TiCl4 to about 1200C in an inert atmosphere
Question 14:
Redox equation of Group 2 elements with water
Answer:
X(s) + 2H2O(l) -> X2+(aq) +2OH-(aq) + H2(g)
