Production of metals. Alloys
Answers are for parents and teachers.
1
Which metallurgical methods do ZnO + C → Zn + CO and CuSO₄ + Zn → ZnSO₄ + Cu belong to?
The first is pyrometallurgy and the second hydrometallurgy.
2
How many grams of chromium come from 152 g Cr₂O₃ by aluminothermy? (A(Cr) = 52)
104
3
Why is steel used more widely than pure iron?
Steel (Fe + C) is harder and stronger than pure iron, and its properties can be controlled by changing the composition.
4
How many grams of pure gold are in a 50 g chain of 750 fineness?
37.5 g
5
Write information about three metals or deposits/complexes in Uzbekistan.
For example: gold — the Muruntau deposit in the Kyzylkum; copper — the Almalyk Mining and Metallurgical Complex (Kalmakyr deposit); silver — deposits in Navoi region.