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Standard X

Chemistry

Extracting Metals in the Middle of Reactivity Series

When Fe2O3 ...

Question

When $F e_{2} O_{3}$ is heated with aluminium powder, the products obtained are _______ .

F e

A l_{2} O_{3}

and heat.

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F e

and

A l_{2} O_{3}

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F e O

A l_{2} O_{3}

and heat.

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F e O

and

A l_{2} O_{3}

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Solution

The correct option is B $F e$ , $A l_{2} O_{3}$ and heat.
When $F e_{2} O_{3}$ is heated with aluminium powder, the products obtained are $F e$ , $A l_{2} O_{3}$ and $h e a t$ .
$F e_{2} O_{3} + 2 A l \to 2 F e + A l_{2} O_{3} +$ $h e a t$

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Similar questions

Q. For the reaction

2 A l + F e_{2} O_{3} ⟶ 2 F e + A l_{2} O_{3}

, the standard heat enthalpy of

F e_{2} O_{3}

and

A l_{2} O_{3}

are

- 196.5

and

- 399.1

kcal respectively.

Δ H^{\circ}

for the reaction is:

Q. When

10 g

A l

is used for reduction in each of the following alumino thermic reactions, which reaction would generate more heat and by how much ?
a.

2 A l + C r_{2} O_{3} \to A l_{2} O_{3} + 2 C r

2 A l + F e_{2} O_{3} \to A l_{2} O_{3} + 2 F e

Standard heat of formation of

A l_{2} O_{3}

C r_{2} O_{3}

and

F e_{2} O_{3}

are

- 1676 k J

- 1141 k J

and

- 822.2 k J

, respectively.

Δ H_{f}^{\circ}

F e_{2} O_{3}

and

A l_{2} O_{3}

are -189 kJ and -405 kJ respectively. How much heat (in kJ) is given out during reaction of 1 g Al according to

2 A l + F e_{2} O_{3} ⟶ A l_{2} O_{3} + 2 F e

You are given an Ellingham diagram (deliberately not shown). It is given that for almost all practically achievable temperatures, the $F e \to F e_{2} O_{3}$ line lies above the $A l \to A l_{2} O_{3}$ line and $Δ_{f} G^{\circ}$ for both $A l_{2} O_{3}$ and $F e_{2} O_{3}$ are negative. Which of the following statements is/are true?

Q. Diethyl ether when heated to

350^{0} C

with

A l_{2} O_{3}

forms :

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When Fe2O3 is heated with aluminium powder, the products obtained are _______ .

The correct option is B Fe, Al2O3 and heat.When Fe2O3 is heated with aluminium powder, the products obtained are Fe, Al2O3 and heat.Fe2O3+2Al→2Fe+Al2O3+ heat

When $F e_{2} O_{3}$ is heated with aluminium powder, the products obtained are _______ .

The correct option is B $F e$ , $A l_{2} O_{3}$ and heat.
When $F e_{2} O_{3}$ is heated with aluminium powder, the products obtained are $F e$ , $A l_{2} O_{3}$ and $h e a t$ .
$F e_{2} O_{3} + 2 A l \to 2 F e + A l_{2} O_{3} +$ $h e a t$