Can the solution be acidified with `HNO_(3)` in group II before passing `H_(2)S` gas?

Explanation

To determine whether the solution can be acidified with nitric acid (HNO₃) in Group II before passing hydrogen sulfide (H₂S) gas, we need to consider the chemical properties of HNO₃ and its effect on H₂S.

### Step-by-Step Solution:

1. **Understanding Group II Analysis**:
In qualitative inorganic analysis, Group II cations include metals like lead (Pb²⁺), mercury (Hg²⁺), and cadmium (Cd²⁺). These cations are typically precipitated as sulfides when H₂S is passed through the solution.

2. **Role of Nitric Acid (HNO₃)**:
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