Question:
The method by which very pure nitrogen can be obtained is
The method by which very pure nitrogen can be obtained is
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Pure gases are best obtained from reactions where all byproducts except the desired gas remain in the solid state.
Updated On: Jun 8, 2026
- Thermal decomposition of ammonium dichromate
- Thermal decomposition of barium azide
- Reaction of aqueous ammonium chloride with sodium nitrite
- Thermal decomposition of ammonium nitrate
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The Correct Option is B
Solution and Explanation
Concept:
Very pure nitrogen is obtained when nitrogen is the only gaseous product formed during decomposition.
Step 1: Write the decomposition reaction.
Thermal decomposition of barium azide: \[ Ba(N_3)_2 \rightarrow Ba + 3N_2 \]
Step 2: Analyze the products formed.
In this reaction:
• Barium remains as a solid.
• Nitrogen gas is the only gaseous product.
Hence, the nitrogen obtained is extremely pure. Therefore: \[ \boxed{\text{Thermal decomposition of barium azide}} \]
Step 1: Write the decomposition reaction.
Thermal decomposition of barium azide: \[ Ba(N_3)_2 \rightarrow Ba + 3N_2 \]
Step 2: Analyze the products formed.
In this reaction:
• Barium remains as a solid.
• Nitrogen gas is the only gaseous product.
Hence, the nitrogen obtained is extremely pure. Therefore: \[ \boxed{\text{Thermal decomposition of barium azide}} \]
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