Millionaire Mode

Extraction of copper and zinc from their oxides - class-XII

Question 1 of 61

Blister copper obtained during extraction from cuprous oxide is called so because:

  1. it has blister like eruptions due to evolution of gas
  2. it has a shining surface like blister
  3. it is the most impure form of copper
  4. its surface is uneven due to different thickness at different place

Prize Money

15₹7 Crores
14₹1 Crore
13₹50,00,000
12₹25,00,000
11₹12,50,000
10₹6,40,000
9₹3,20,000
8₹1,60,000
7₹80,000
6₹40,000
5₹20,000
4₹10,000
3₹5,000
2₹2,000
1₹1,000