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Smelting

Among the fol...

Question

Among the following pairs of oxides, In which pair both are reduced by carbon?

A

{S n O}_{2}, {M n O}_{2}

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B

{F e}_{2} O_{3}, S n O_{2}

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C

Z n O, K_{2} O

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D

C a O, {C r}_{2} O_{3}

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Solution

The correct option is C ${F e}_{2} O_{3}, S n O_{2}$
Carbon Reduction Process:
The reduction takes place in presence of coke or coal or carbon monoxide. The process is done for that metals which are having a lower melting point.
Examples :
(1) $F e_{2} O_{3} + 3 C O \to 2 F e + 3 C O_{2}$
(2) $S n O_{2} + 2 C O \to S n + 2 C O_{2}$

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Similar questions

Q. The correct statements among the following are:
I.

S n O_{2}

has an amphoteric character.
II.

O_{3}

is a linear molecule.
III. Sulphur has oxidation states of +5 and +3 in disulphurous acid.

List I	List II
A. Calcination	a. $2 {C u}_{2} S + 3 O_{2} \to 2 {C u}_{2} O + 2 S O_{2}$
B. Roasting	b. ${F e}_{2} O_{3} \cdot n H_{2} O \to {F e}_{2} O_{3} + n H_{2} O$
C. Flux	c. ${C r}_{2} O_{3} + 2 A l \to {A l}_{2} O_{3} + 2 C r$
D. Thermite	d. $S i O_{2} + F e O \to F e S i O_{3}$

Match the following.

Q. Assertion :SnO is more reactive towards acid than

S n O_{2}

Reason: Both SnO and

S n O_{2}

are amphoteric oxides

Q. Carbon reduction process is not commercially applicable for which of the following set of oxides to extract the respective metal?

Z n O

F e_{2} O_{3}

A l_{2} O_{3}

S n O_{2}

M g O

Q. The correct statements among the following are:
I.

S n O_{2}

has an amphoteric character.
II.

O_{3}

is a linear molecule.
III. Sulphur has oxidation states of +5 and +3 in disulphurous acid.

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