Question:
The moisture present in ammonia can be removed by using which of the following?
The moisture present in ammonia can be removed by using which of the following?
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Quicklime \((CaO)\) is commonly used to dry basic gases like ammonia because it removes water without reacting with the gas.
Updated On: Jun 25, 2026
- \(P_4O_{10}\)
- Conc. \(H_2SO_4\)
- \(CaCl_2\) (anhydrous)
- \(CaO\)
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The Correct Option is D
Solution and Explanation
Step 1: Requirement of drying agent for ammonia.
A suitable drying agent for ammonia should: \[ \text{remove moisture without reacting with }NH_3 \]
Step 2: Analyze the given drying agents.
\[ P_4O_{10} \] reacts with ammonia, hence it cannot be used.
Conc. \[ H_2SO_4 \] reacts with ammonia to form ammonium sulfate: \[ 2NH_3+H_2SO_4\rightarrow (NH_4)_2SO_4 \] Hence, it cannot be used.
Anhydrous \[ CaCl_2 \] absorbs ammonia and forms addition compounds, so it is unsuitable.
Quicklime: \[ CaO \] absorbs moisture but does not react with ammonia.
Hence, it is used as drying agent for ammonia gas.
Step 3: Final conclusion.
Therefore, moisture in ammonia is removed using \[ \boxed{CaO} \]
A suitable drying agent for ammonia should: \[ \text{remove moisture without reacting with }NH_3 \]
Step 2: Analyze the given drying agents.
\[ P_4O_{10} \] reacts with ammonia, hence it cannot be used.
Conc. \[ H_2SO_4 \] reacts with ammonia to form ammonium sulfate: \[ 2NH_3+H_2SO_4\rightarrow (NH_4)_2SO_4 \] Hence, it cannot be used.
Anhydrous \[ CaCl_2 \] absorbs ammonia and forms addition compounds, so it is unsuitable.
Quicklime: \[ CaO \] absorbs moisture but does not react with ammonia.
Hence, it is used as drying agent for ammonia gas.
Step 3: Final conclusion.
Therefore, moisture in ammonia is removed using \[ \boxed{CaO} \]
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