1.

Hydrogen gas will not reduce:A. (a)Heated cupric oxideB. (b)Heat ferric oxideC. (c )Heated stannic oxideD. (d)Heated aluminium oxide

Answer» Correct Answer - D
Al is more electroposition than `H`. No doubt Fe and Sn are also more electroposition than `H` but they are reduced from `Fe^(3+)` to `Fe^(2+), Sn^(4+) to Sn^(2+)`.


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