. Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.


(a) Thermite reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.
 
(b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.
 
(c) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
 
(d) Ethanol is burnt in air to form carbon dioxide, water and releases heat.
 

Best Answer

Answer: (a) Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.

FE2O3 + 2Al → Al2O3(s)+ 2Fe (l)
 
This is a Single displacement reaction
 
(b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.
3 Mg(s)+ N2 → Mg3N2
 
The reaction is a Combination reaction
 
(c) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
Cl2(g)+2KI (aq) → 2KCl(Aq) +I2(s)
 
This is a Single displacement reaction
 
(d) Ethanol is burnt in air to form carbon dioxide, water and releases heat.
 
C2H5OH+ 3O2 → 2CO2+ 3H2O+ heat
 
This is a Combustion reaction

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