1)Explain how sulphur (iv) oxide gas can be arrested to avoid pollution to our environment. Write two equations with bases such as Ca(OH)2 and NaOH
2)When the chief ore is CuCO3,write an equation to show how it can be decomposed by use of heat
3)Using an equation,show how carbon and carbon(ii) oxide can be used as reducing agents of CuO obtained
4)Why is aluminium a very good conductor of heat and electricity?Explain
5)Why are copper wires more used in electrical wire than any other metal
6)The density of copper is 8.9g/cm while density of sodium is 0.97 g/cm.Explain
7)Metals are malleable and ductile ,explain
8)The boiling point of sodium is 890° while that of aluminium is 2470°C.Explain
9)Name the colour of ;
a)NaO
b)Al2O3
c)ZnO
d)FeO
e)CuO
1) Sulphur (IV) oxide gas can be arrested by reacting it with bases such as Ca(OH)2 or NaOH to form a less harmful compound such as calcium sulphite or sodium sulphite.
Equations:
Ca(OH)2 + SO2 -> CaSO3 + H2O
NaOH + SO2 -> Na2SO3 + H2O
2) CuCO3 + heat -> CuO + CO2
3) CuO + C -> Cu + CO
CuO + CO -> Cu + CO2
4) Aluminium is a very good conductor of heat and electricity because of its high thermal and electrical conductivity due to the presence of free electrons that can easily move within the metal structure.
5) Copper wires are more used in electrical wiring than any other metal because of their high electrical conductivity, ductility, and resistance to corrosion.
6) The high density of copper compared to sodium is due to the differences in atomic mass and atomic structure of the two elements.
7) Metals are malleable and ductile because of their metallic bonding, which allows the atoms to slide past each other easily without breaking the overall structure.
8) The difference in boiling points between sodium and aluminium is due to the differences in intermolecular forces and atomic structure of the two elements.
9)
a) NaO - white
b) Al2O3 - white
c) ZnO - white
d) FeO - black
e) CuO - black