Gce Model Questions Vol1 2019 Chemistry Question 25

Practice objective / multiple choice question 25 from the 2019 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Medium Difficulty
Question 25 GCE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective

In acidic solution the redox reaction between permanganate ion and oxalate ion is: \(\mathrm{MnO_4^- + C_2O_4^{2-} \rightarrow Mn^{2+} + CO_2}\). (a) Write the balanced overall equation with the smallest whole‑number coefficients. (b) Calculate the volume (in mL) of 0.200 M \(\mathrm{KMnO_4}\) required to completely react with 25.0 mL of 0.150 M \(\mathrm{Na_2C_2O_4}\).

Answer Options

A. (a) \\(2\\mathrm{MnO_4^-} + 5\\mathrm{C_2O_4^{2-}} + 16\\mathrm{H^+} \\rightarrow 2\\mathrm{Mn^{2+}} + 8\\mathrm{CO_2} + 8\\mathrm{H_2O}\\). (b) 8.0 mL
B. (a) \\(2\\mathrm{MnO_4^-} + 5\\mathrm{C_2O_4^{2-}} + 14\\mathrm{H^+} \\rightarrow 2\\mathrm{Mn^{2+}} + 10\\mathrm{CO_2} + 7\\mathrm{H_2O}\\). (b) 6.0 mL
Correct Answer C. (a) \(2\mathrm{MnO_4^-} + 5\mathrm{C_2O_4^{2-}} + 16\mathrm{H^+} \rightarrow 2\mathrm{Mn^{2+}} + 10\mathrm{CO_2} + 8\mathrm{H_2O}\). (b) 7.5 mL
D. (a) \\(2\\mathrm{MnO_4^-} + 5\\mathrm{C_2O_4^{2-}} + 16\\mathrm{H^+} \\rightarrow 2\\mathrm{Mn^{2+}} + 10\\mathrm{CO_2} + 8\\mathrm{H_2O}\\). (b) 5.0 mL
Correct Answer
C
Correct Option:
(a) \(2\mathrm{MnO_4^-} + 5\mathrm{C_2O_4^{2-}} + 16\mathrm{H^+} \rightarrow 2\mathrm{Mn^{2+}} + 10\mathrm{CO_2} + 8\mathrm{H_2O}\). (b) 7.5 mL

About This Question

This is Gce Model Questions Vol1 2019 Chemistry Question 25. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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