NEETChemistryp Block Elements (Group 15, 16, 17 & 18)
Which of the following reactions is involved in the formation of the brown ring in the ring test of NO 3 – ion when Fe 2 + ion reduces nitrate ion to nitric oxide and combines with Fe2+ (aq) ion?
Options
- AFe 2+ + NO 3 – → NO 2 + Fe 3+
- BNO 3 – + 3Fe 2+ + 4H + → NO + 3Fe 3+ + 2H 2 O
- CNO 2 – + 3Fe 2+ + 4H + → NO + 3Fe 3+ + 2H 2 O
- DNO 3 – + 3Fe 2+ + 4H + → NO + 2Fe 3+ + 2H 2 O
Correct answer
B. NO 3 – + 3Fe 2+ + 4H + → NO + 3Fe 3+ + 2H 2 O
Step-by-step solution
Correct Option is : (B) NO 3 – + 3Fe 2+ + 4H + → NO + 3Fe 3+ + 2H 2 O