Question

Blister copper obtained during extraction from curprous oxide is called so because

• A. It has blister like eruption due to evolution of gas.
• B. It has a shining surface like blister
• C. It is the most impure form of copper
• D. Its surface is uneven due to different thickness at different places.

Answer 1

Answer: (A)

It has blister like eruption due to evolution of gas.

Answer 2

Solidified copper obtained is called blister copper since it has blistered appearance due to the evolution of sulphur dioxide gas,

$2 \mathrm { Cu } _ { 2 } \mathrm { O } + \mathrm { Cu } _ { 2 } \mathrm {~S} \rightarrow 6 \mathrm { Cu } + \mathrm { SO } _ { 2 }$