Question:
Which among the following group-15 elements does NOT react with concentrated sulfuric acid?
Which among the following group-15 elements does NOT react with concentrated sulfuric acid?
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Nitrogen's lack of reactivity with concentrated sulfuric acid is due to its high bond strength, making it more stable in its elemental form.
Updated On: Jan 27, 2026
- Phosphorus
- Arsenic
- Nitrogen
- Antimony
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the reactivity.
Group 15 elements generally react with concentrated sulfuric acid, but nitrogen is an exception due to its strong bond and inertness in this reaction. Other elements like phosphorus, arsenic, and antimony react to form respective oxides and other products.
Step 2: Analyzing the options.
(A) Phosphorus: Phosphorus reacts with concentrated sulfuric acid to form phosphoric acid and phosphorous acid.
(B) Arsenic: Arsenic reacts with concentrated sulfuric acid, forming arsenic acid.
(C) Nitrogen: Nitrogen does not react with concentrated sulfuric acid under normal conditions.
(D) Antimony: Antimony reacts with concentrated sulfuric acid, forming antimony pentachloride.
Step 3: Conclusion.
The correct answer is (C) Nitrogen, as it does not react with concentrated sulfuric acid.
Group 15 elements generally react with concentrated sulfuric acid, but nitrogen is an exception due to its strong bond and inertness in this reaction. Other elements like phosphorus, arsenic, and antimony react to form respective oxides and other products.
Step 2: Analyzing the options.
(A) Phosphorus: Phosphorus reacts with concentrated sulfuric acid to form phosphoric acid and phosphorous acid.
(B) Arsenic: Arsenic reacts with concentrated sulfuric acid, forming arsenic acid.
(C) Nitrogen: Nitrogen does not react with concentrated sulfuric acid under normal conditions.
(D) Antimony: Antimony reacts with concentrated sulfuric acid, forming antimony pentachloride.
Step 3: Conclusion.
The correct answer is (C) Nitrogen, as it does not react with concentrated sulfuric acid.
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