IIT Inorganic

1. Which one among the following pairs of ions cannot be seperated by H₂S in dil HCl ?
A. Bi³⁺,Sn⁴⁺
B. Al³⁺,Hg²⁺
C. Zn²⁺,Cu²⁺
D. Ni²⁺,Cu²⁺ (1986)

2. Hydrogen gas will not reduce
(A). heated Cupric Oxide
(B). heated ferric oxide
(C). heated stannic oxide.
(D). heated aluminium oxide. (1985)

6 Answers

Ans A
see the group table of cations

@govind yes your ans is right.

someone try the 2nd one.

Ans 2 D
Hint : compare the standard electrode potentials

ya me too think its option D for q 2.

yes D is right.

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