Question:

In the reaction \( \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \), ratio by volume of \( \text{N}_2, \text{H}_2 \) and \( \text{NH}_3 \) is \(1:3:2\). This illustrates law of:

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Gas reactions at same T and P follow simple volume ratios.
Updated On: Apr 15, 2026
  • definite proportion
  • multiple proportion
  • reciprocal proportion
  • gaseous volumes
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The Correct Option is D

Solution and Explanation

Concept: Gay-Lussac’s law of gaseous volumes: \[ \text{Volumes of reacting gases bear simple whole number ratios} \]

Step 1:
Given reaction.
\[ \text{N}_2 : \text{H}_2 : \text{NH}_3 = 1 : 3 : 2 \]

Step 2:
Interpretation.
The ratio of volumes is simple integers. \[ \Rightarrow \text{Law of gaseous volumes} \]
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