Solidified $C u$ obtained from the reverberatory furnace has blistered appearance. This is due to:

evolution of

C O_{2}

gas

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evolution of

S O_{2}

gas

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evaporation of volatile materials

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evolution of

N O_{2}

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Solution

The correct option is B evolution of $S O_{2}$ gas
The reaction taking place at the reverberatory furnace can be represented as

$2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2}$

The evolution of $S O_{2}$ gas in the product provides a blistered appearance to solidified copper. Hence B is the correct answer

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Similar questions

Q. Which of the following statements are incorrect?
I. Zinc can be extracted by self-reduction.
II. A depressant prevents a certain type of particles to come to the froth.
III. Copper matte contains

Z n S

and

C u_{2} S

.
Iv. The solidified copper obtained from reverberatory furnace has blistered appearance due to the evolution of

S O_{2}

during the extraction.

Q. The solid copper obtained from copper matte has blistered appearance. It is due to

Match the items of Column I with items of Column II and assign the correct code.
$\begin{matrix} C o l u m n I & C o l u m n I I A . B l i s t e r r e d C u & 1. A l u m i n i u m B . B l a s t f u r n a c e & 2. 2 C u_{2} O + C u_{2} S ⟶ 6 C u + S O_{2} C . R e v e r b e r a t o r y f u r n a c e & 3. I r o n D . H a l l - H e r o u l t p r o c e s s & 4. F e O + S i O_{2} ⟶ F e S i O_{3} 5. 2 C u_{2} S + 3 O_{2} ⟶ 2 C u_{2} O + 2 S O_{2} \end{matrix}$
Codes
A B C D A B C D
(a) 2 3 4 1 (b) 1 2 3 5
(c) 5 4 3 2 (d) 4 5 3 2

Q. Choose the correct option using the code regarding roasting process.
I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide.
II) It is an exothermic process.
III) It is used for the concentration of sulphide ore.
IV) It removes easily oxidisable volatile impurities present in the concentrated ore.

Q. Assertion :Copper obtained after bessemerization is known as blister copper. Reason: Blisters are produced on the surface of the metal due to escaping of dissolved

S O_{2}

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Solidified Cu obtained from the reverberatory furnace has blistered appearance. This is due to:

The correct option is B evolution of SO2 gasThe reaction taking place at the reverberatory furnace can be represented as2Cu2O+Cu2S→6Cu+SO2The evolution of SO2 gas in the product provides a blistered appearance to solidified copper. Hence B is the correct answer

Solidified $C u$ obtained from the reverberatory furnace has blistered appearance. This is due to: