${F e}_{2} O_{3}$ + $A l$ $\to$ $F e$ + ${A l}_{2} O_{3}$
This is the reaction used in thermite welding process. Calcium can also be used instead of aluminium in this process.

True

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False

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Solution

The correct option is A
True

Iron is being displaced by aluminium. Thus, Al is more reactive than iron. Any metal more reactive than Iron can be used. Since calcium is above iron in the reactivity series, it can be used.

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${F e}_{2} O_{3}$ + $A l$ $\to$ $F e$ + ${A l}_{2} O_{3}$ + $h e a t$
This is the reaction used in thermite welding process. Calcium can also be used instead of aluminium in this process.

Q. Assertion :Statement- I : Thermite mixture

{F e}_{2} O_{3}

+ Al (powder) is used in the welding. Reason: Statement- II : Al is a good reductant

Aluminium is used in thermite welding:

(a) What is thermit?

(b) What is ignition mixture?

Q. Assertion :Aluminium is use in thermite process. Reason: Aluminium has a high affinity for oxygen. It readily removes oxygen from oxides of less reactive metals so it is used in thermite welding.

Q. If the heats of formation of

{A l}_{2} O_{3} (s)

and

{C r}_{2} O_{3} (s)

are

1596 k J

and

1134 k J

(both exothermic) respectively. Calculate

Δ H

of the thermite reaction.

{C r}_{2} O_{3} (s) + 2 A l (s) ⟶ 2 C r (s) + {A l}_{2} O_{3} (s)

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Fe2O3 + Al → Fe + Al2O3 This is the reaction used in thermite welding process. Calcium can also be used instead of aluminium in this process.

The correct option is A True Iron is being displaced by aluminium. Thus, Al is more reactive than iron. Any metal more reactive than Iron can be used. Since calcium is above iron in the reactivity series, it can be used.

${F e}_{2} O_{3}$ + $A l$ $\to$ $F e$ + ${A l}_{2} O_{3}$
This is the reaction used in thermite welding process. Calcium can also be used instead of aluminium in this process.

The correct option is A
True

Iron is being displaced by aluminium. Thus, Al is more reactive than iron. Any metal more reactive than Iron can be used. Since calcium is above iron in the reactivity series, it can be used.