First slide

Hydrogen

Question

Hydrogen will not reduce heated

Easy

A

cupric oxide
B

ferric oxide
C

stannic oxide
D

aluminium oxide

Solution

CuO + H₂→ Cu + H₂O
Dihydrogen redues some metal oxides [Less active metal oxdies] into respective metal
Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
SnO₂ + 3H₂ → Sn + 2H₂O
Al₂O₃ + H₂
No reduction of Al₂O₃ by H₂

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