One mole KMnO<sub>4</sub> oxidises how many moles of ferrous oxalate?

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51

Physical Chemistry MCQ with Answers

51) One mole KMnO₄ oxidises how many moles of ferrous oxalate?

1⁄5

5⁄3

1⁄3

2⁄3

Answer is:

1⁄5

Physical Chemistry MCQ with Answers

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52) How many mL of 0.1M oxalic acid solution is required to reduce 0.01 mol KMnO₄ to MnO₂?

250

150

100

500

Answer is:

150

53) When one mole NO₃⁻ is converted into 1 mol NO₂, 0.5 mol N₂ and 0.5 mol N₂O respectively. It accepts x, y and z moles of electrons. x, y and z are respectively:

1, 5, 4

1, 2, 3

2, 1, 3

2, 3, 4

Answer is:

1, 5, 4

54) In which of the following pairs, the constants⁄ quantities are not mathematically related to each other?

Gibb′s free energy and standard cell potential

Equilibrium constant and standard cell potential

Rate constant and activation energy

Rate constant and standard cell potential

Answer is:

Rate constant and standard cell potential

55) In the reaction, 3Br₂ + 6CO₃²⁻ + 3H₂O → 5Br⁻ + BrO₃⁻ + 6HCO₃⁻:

Bromine is oxidised and carbonate is reduced

Bromine is reduced and water is oxidised

Bromine is neither reduced nor oxidised

Bromine is both reduced and oxidised

Answer is:

Bromine is both reduced and oxidised

Explanation:

Oxidation number of Br increases from 0 in Br₂ to +5 in BrO₃⁻. And, it also decreases from 0 in Br₂ to −1 in Br⁻.

Physical Chemistry MCQ with Answers

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51) One mole KMnO4 oxidises how many moles of ferrous oxalate?

1⁄5

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

52) How many mL of 0.1M oxalic acid solution is required to reduce 0.01 mol KMnO4 to MnO2?

150

53) When one mole NO3− is converted into 1 mol NO2, 0.5 mol N2 and 0.5 mol N2O respectively. It accepts x, y and z moles of electrons. x, y and z are respectively:

1, 5, 4

54) In which of the following pairs, the constants⁄ quantities are not mathematically related to each other?

Rate constant and standard cell potential

55) In the reaction, 3Br2 + 6CO32− + 3H2O → 5Br− + BrO3− + 6HCO3−:

Bromine is both reduced and oxidised

Physical Chemistry MCQ with Answers

51) One mole KMnO₄ oxidises how many moles of ferrous oxalate?

52) How many mL of 0.1M oxalic acid solution is required to reduce 0.01 mol KMnO₄ to MnO₂?

53) When one mole NO₃⁻ is converted into 1 mol NO₂, 0.5 mol N₂ and 0.5 mol N₂O respectively. It accepts x, y and z moles of electrons. x, y and z are respectively:

55) In the reaction, 3Br₂ + 6CO₃²⁻ + 3H₂O → 5Br⁻ + BrO₃⁻ + 6HCO₃⁻: