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Calcination

Assertion :Ex...

Question

Assertion :Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason: The reaction:

$F e_{2} O_{3} (s) \to F e (s) + 3 / 2 O_{2} (g)$

is a spontaneous process.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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C

Assertion is correct but Reason is incorrect.

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D

Assertion is incorrect but Reason is correct.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Iron is obtained from $F e_{2} O_{3}$ by heating it with a mixture of coke and $C a C O_{3}$ in a blast furnace in which $C O$ formed reduces $F e_{2} O_{3}$ to $F e$ .

$F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$

However, the reason is incorrect because the reaction, $F e_{2} O_{3} (s) \to F e (s) + \frac{3}{2} O_{2} (g)$ is not a spontaneous reaction.

Hence, option C is correct.

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Similar questions

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

CaO

formed by decomposition of

{CaCO}_{3}

{SiO}_{2}

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

Q. Assertion :Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason: The reaction

F e_{2} {S O}_{3} Δ \to F e (s) + {3 / 2 O}_{2} (g)

is a spontaneous process at standarde condition.

Read the above assertion and reason and choose the correct option regarding it.

Q. Assertion: The compressibility factor for

H_{2}

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

H e

can be derived from Van der Waal's equation.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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