When chlorine is passed through an aqueous solution of potassium bromide, then chlorine displaces .

${\mathrm{Fe}}_2{\mathrm{O}}_3+2\mathrm{Al}\to {\mathrm{Al}}_2{\mathrm{O}}_3+2\mathrm{Fe}$

The above reaction is an example of

Give balanced chemical equation for following reaction-

${\mathrm{Fe}}_2{\mathrm{O}}_3 + 2\mathrm{Al} \stackrel{ }{\to } {\mathrm{Al}}_2{\mathrm{O}}_3 + \mathrm{Fe}$

${\mathrm{Fe}}_2{\mathrm{O}}_3+2\mathrm{Al}\to {\mathrm{Al}}_2{\mathrm{O}}_3+2\mathrm{Fe}$

The type of the above reaction is:

Which of the following reaction does not takes place? State the reason.

(i) ${\mathrm{FeSO}}_4 + \mathrm{Mg} \stackrel{}{\to }{\mathrm{MgSO}}_4 + \mathrm{Fe}$  

(ii) ${\mathrm{ZnSO}}_4 + \mathrm{Cu} \stackrel{}{\to }{\mathrm{CuSO}}_4 + \mathrm{Zn}$ 

${\mathrm{Fe}}_2{\mathrm{O}}_3 +2\mathrm{Al} \to {\mathrm{Al}}_2{\mathrm{O}}_3 +2\mathrm{Fe}$

The above reaction is an example of a

In a double displacement reaction such as the reaction between sodium sulphate solution and barium chloride solution:

(A) exchange of atoms takes place.

(B) exchange of ions takes place.

(C) a precipitate is produced.

(D) an insoluble salt is produced.

The correct option is:

${\mathrm{Fe}}_2{\mathrm{O}}_3+2\mathrm{Al}\to {\mathrm{Al}}_2{\mathrm{O}}_3+2\mathrm{Fe}$

The above reaction is an example of a