Disproportionation Reactions

Chemistry ⇒ Redox Reactions and Electrochemistry

Disproportionation Reactions starts at 11 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Disproportionation Reactions. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 11

Describe the changes in oxidation state for the element sulfur in the disproportionation of thiosulfate ion (S₂O₃^2-) to sulfate (SO₄^2-) and sulfite (SO₃^2-).

Describe the role of oxidation states in identifying disproportionation reactions.

Explain why chlorine gas reacts with cold, dilute NaOH to give both NaCl and NaClO in a disproportionation reaction.

Explain why fluorine does not undergo disproportionation reactions.

Describe the changes in oxidation state for the element sulfur in the disproportionation of thiosulfate ion (S₂O₃^2-) to sulfate (SO₄^2-) and sulfite (SO₃^2-).

Explain why the reaction 2Fe³⁺ + 2I^- → 2Fe²⁺ + I₂ is not a disproportionation reaction.

In the disproportionation of NO₂ in alkaline medium, what are the oxidation states of nitrogen in the reactant and products?

In the reaction: 2HNO₂ → HNO₃ + NO + H₂O, what are the oxidation states of nitrogen in the reactant and products?

Which of the following best defines a disproportionation reaction? (1) A reaction where a substance is both oxidized and reduced. (2) A reaction where two substances exchange electrons. (3) A reaction where a substance only gains electrons. (4) A reaction where a substance only loses electrons.

Which of the following elements is least likely to undergo disproportionation? (1) Chlorine (2) Manganese (3) Sodium (4) Sulfur

Which of the following halogens is most likely to undergo disproportionation in water? (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

Which of the following is a characteristic of a disproportionation reaction? (1) The same element is present in different oxidation states in the products. (2) The reaction always produces a gas. (3) The reactant is always a metal. (4) The reaction is always endothermic.

Fill in the blank: In a disproportionation reaction, the same element is both _______ and _______.

Fill in the blank: In the disproportionation of chlorine in water, the products are HCl and _______.

Fill in the blank: In the disproportionation of copper(I) ion, the products are copper(II) ion and _______.

Fill in the blank: In the disproportionation of nitrous acid (HNO₂), the products are nitric acid (HNO₃) and _______.

True or False: Disproportionation reactions are a type of redox reaction.

True or False: Disproportionation reactions can be reversed by changing the reaction conditions.

True or False: Disproportionation reactions can only occur in elements that have at least three possible oxidation states.

True or False: In a disproportionation reaction, the same element undergoes both oxidation and reduction.