Q.

Which is known as 'blister copper ?

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a

Pure copper

b

98% copper

c

Alloy of copper

d

Ore of copper

answer is B.

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Detailed Solution

Copper that is 97 to 98 percent pure, produced by smelting is called as Blister Copper. It has a blistery surface caused by sulfur dioxide bubbles.
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Which is known as 'blister copper ?