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  • Write the balanced chemical equations for the following reactions and identify the type of reaction in each case. (a) Thermit reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.

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

(a) Thermit 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.

 

Answers (1)

 (a) Thermit reaction, iron (III) oxide reacts with aluminum and gives molten iron and aluminum oxide.

Fe_2O_3 + 2Al\rightarrow Al_2O_3(s) + 2Fe + heat

Single displacement reaction

(b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.

3 Mg(s) + N_2\rightarrow Mg_3N_2

Combination reaction

(c) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.

Cl_2 (g) + 2KI (aq) \rightarrow 2KCl (aq) + I_2(s)

  Displacement reaction

(d) Ethanol is burnt in air to form carbon dioxide, water and releases heat.

C_2H_5OH + 3O_2\rightarrow 2CO_2 + 3H_2O + heat

Combustion reaction

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