Waec Model Questions Vol1 2017 Chemistry Question 49

Practice objective / multiple choice question 49 from the 2017 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 49 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

Balance the following redox reaction that occurs in acidic solution: K₂Cr₂O₇ + FeSO₄ + H₂SO₄ → K₂SO₄ + Fe₂(SO₄)₃ + Cr₂(SO₄)₃ + H₂O. Provide the smallest whole‑number coefficients for each compound.

Answer Options

A. 2 K₂Cr₂O₇ + 6 FeSO₄ + 7 H₂SO₄ → 2 K₂SO₄ + 3 Fe₂(SO₄)₃ + 2 Cr₂(SO₄)₃ + 7 H₂O
B. 1 K₂Cr₂O₇ + 6 FeSO₄ + 6 H₂SO₄ → 1 K₂SO₄ + 3 Fe₂(SO₄)₃ + 1 Cr₂(SO₄)₃ + 6 H₂O
Correct Answer C. 1 K₂Cr₂O₇ + 6 FeSO₄ + 7 H₂SO₄ → 1 K₂SO₄ + 3 Fe₂(SO₄)₃ + 1 Cr₂(SO₄)₃ + 7 H₂O
D. 1 K₂Cr₂O₇ + 5 FeSO₄ + 8 H₂SO₄ → 1 K₂SO₄ + 2 Fe₂(SO₄)₃ + 1 Cr₂(SO₄)₃ + 8 H₂O
Correct Answer
C
Correct Option:
1 K₂Cr₂O₇ + 6 FeSO₄ + 7 H₂SO₄ → 1 K₂SO₄ + 3 Fe₂(SO₄)₃ + 1 Cr₂(SO₄)₃ + 7 H₂O

About This Question

This is Waec Model Questions Vol1 2017 Chemistry Question 49. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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