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Standard XII

Chemistry

Ores and Minerals

Blister coppe...

Question

Blister copper is refined by stirring molten impure metal with green logs of wood because such woods liberate gases (like $C H_{4}$ ). This process X is called , and it is used to purify the metal that initially contain impurities of the oxide Y. X and Y can be:

X = poling,

Y = S n O_{2}

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X = cupellation. Y = CuO

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X = cupellation, Y = ZnO

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X = poling, Y = CuO

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Solution

The correct option is D X = poling, Y = CuO
Poling is a purification process which is used for metals which contain their own oxide as an impurity

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Similar questions

Q. Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberate hydrocarbon gases (like

C H_{4}

). This process

X

is called ______ and the metal contains impurities of

Y

is ___________ .

Q. Mark the correct statements:

(i) mercury can be refined by the process of distillation.

(ii) In poling, the molten impure metal is stirred with green poles of wood.

(iii) In electrolyte refining of metals, impure metal is made as cathode and a thin strip of pure metal is made as anode.

Q. Identify

x, y a n d z

for the following metallurgical process :

M e t a l s u l p h i d e x \to M e t a l o x i d e y \to I m p u r e m e t a l

x, y

and

z

are respectively :

Q. Identify x, y, z for the following metallurgical process.

Metal sulphide x \to Metal oxide y \to I m p u r e m e t a l z \to Pure metal

x, y and z are respectively:

A metal X which is resistant to corrosion is produced by the electrolysis of its molten oxide whereas another metal Y which is also resistant to corrosion is produced by the reduction of its oxide with carbon. Metal X can be used in powder form in thermite welding whereas metal Y is used in making cathodes of ordinary dry cells.
(a) Name the metals X and Y.
(b) Which of the two metals is more reactive: X or Y?
(c) Name one ore or metal X. Also, write its chemical formula.
(d) Name one ore of metal Y. Also, write its chemical formula.
(e) Name one alloy of metal X and one alloy of metal Y.

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Blister copper is refined by stirring molten impure metal with green logs of wood because such woods liberate gases (like CH4 ). This process X is called , and it is used to purify the metal that initially contain impurities of the oxide Y. X and Y can be:

The correct option is D X = poling, Y = CuOPoling is a purification process which is used for metals which contain their own oxide as an impurity

Blister copper is refined by stirring molten impure metal with green logs of wood because such woods liberate gases (like $C H_{4}$ ). This process X is called , and it is used to purify the metal that initially contain impurities of the oxide Y. X and Y can be:

The correct option is D X = poling, Y = CuO
Poling is a purification process which is used for metals which contain their own oxide as an impurity