Physical Chemistry MCQ with Answers

Physical Chemistry MCQ with Answers

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

Answer is:

1⁄5

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

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:

Answer is:

1, 5, 4

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

Answer is:

Rate constant and standard cell potential

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

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⁻.

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