Two test tubes containing a nitrate and a bromide are treated separately with `H_(2)SO_(4)`; brown fumes evolved are passed in water . The water will be coloured by vapours evolved from the test tube containing:

Options

A. Nitrate
B. Bromide
C. Both (a) and (b)
D. None of these

Explanation

To solve the question regarding the test tubes containing nitrate and bromide ions treated with `H2SO4`, we will analyze the chemical reactions and the resulting colors.

### Step-by-Step Solution:

1. **Identify the Compounds**: We have two test tubes, one containing a nitrate ion (NO3-) and the other containing a bromide ion (Br-).

2. **Reaction with `H2SO4`**: When both nitrate and bromide ions are treated with concentrated sulfuric acid (`H2SO4`), they undergo different reactions:
- **Nitrate Reaction**: Nitrate ions react with concentrated sulfuric acid to produce nitrogen dioxide (NO2), which is a brown gas. The reaction can be represented as:
\[ 2 \text{HNO}_3 + \text{H}_2\text{SO}_4 \rightarrow 2 \text{NO}_2 + \text{H}_2\text{O} + \text{H}_2\text{SO}_4 \]
- **Bromide Reaction**: Bromide ions react with concentrated sulfuric acid to produce bromine (Br2), which is also a brown gas. The reaction can be represented as:
\[ \text{HBr} + \text{H}_2\text{SO}_4 \rightarrow \text{Br}_2 + \text{H}_2\text{O} + \text{H}_2\text{SO}_4 \]

3. **Passing Brown Fumes in Water**: The brown fumes produced from the reaction of both nitrate and bromide will be passed into water.
- The nitrogen dioxide from the nitrate reaction will dissolve in water to form a colorless solution.
- The bromine from the bromide reaction will dissolve in water and impart a brown color to the solution.

4. **Conclusion**: Since the water will be colored by the vapors evolved from the test tube containing bromide ions (due to the formation of bromine), the answer to the question is that the water will be colored by the vapors evolved from the test tube containing bromide ions.

### Final Answer:
The water will be colored by vapors evolved from the test tube containing bromide ions.