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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

The number of reactions that give SO 2 gas: (a) Cu + conc . H 2 SO 4 → (b) Zn + dil .H 2 SO 4 → (c) S + H 2 SO 4 → (d) FeS 2 + O 2 → (e) NaHSO 3 + dil .H 2 SO 4 → (f) H 2 SO 4 + PCl 5 →

Correct answer

4

Step-by-step solution

C u + c o n c . H 2 S O 4 → C u S O 4 + S O 2 + H 2 O Z n + d i l . H 2 S O 4 → Z n S O 4 + H 2 S + H 2 O S + H 2 S O 4 → 3 S O 2 + 2 H 2 O F e S 2 + O 2 → F e 2 + O 3 + S O 2 N a H S O 3 + d i l . H 2 S O 4 → N a H S O 4 + S O 2 + H 2 O H 2 S O 4 + P C l 5 → P O C l 3 + H S O 3 C l + H C l

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