Silver nitrate solution is kept in brown bottles in laboratory because:

Options

A. it reacts with ordinary bottles
B. brown bottles cut the passage of light through
C. brown bottles do not react with it
D. ordinary bottles catalyst its decomposition

Answer

**Step-by-Step Text Solution:**

1. **Understanding Silver Nitrate**: Silver nitrate (AgNO3) is a chemical compound that is sensitive to light. When exposed to light, it can undergo a decomposition reaction.

2. **Decomposition Reaction**: The decomposition of silver nitrate can be represented by the following reaction:
\[ 2 \, \text{AgNO}_3 (aq) \xrightarrow{\text{light}} 2 \, \text{Ag} (s) + \text{O}_2 (g) + 2 \, \text{NO}_2 (g) \]
In this reaction, silver nitrate decomposes into solid silver (Ag), oxygen gas (O2), and nitrogen dioxide gas (NO2).

3. **Formation of Precipitate**: The solid silver formed during the decomposition is a black precipitate. This is undesirable if we want to keep the silver nitrate solution in its liquid form.

4. **Use of Brown Bottles**: To prevent the decomposition of silver nitrate, it is stored in brown bottles. Brown bottles are designed to block out light, thereby preventing the exposure of silver nitrate to sunlight.

5. **Conclusion**: The reason silver nitrate solution is kept in brown bottles in the laboratory is that these bottles cut the passage of light, preventing the decomposition of the solution into solid silver and other products.

**Final Answer**: Silver nitrate solution is kept in brown bottles in the laboratory because brown bottles cut the passage of light, preventing the decomposition of the solution.

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