12 Questions
What is the defining characteristic of an oxidising agent?
It gains electrons
What is the purpose of adding dilute HCl in the test for sulfites?
To dissolve the white precipitate
What is the colour of the final product when chlorine water is added to potassium iodide solution?
Red-Brown
Which of the following is NOT a common oxidising agent?
Sodium Chloride
What is the purpose of adding BaCl₂ in the test for sulfites?
To form a white precipitate
What is the defining characteristic of a reducing agent?
It loses electrons
What is the test for Fe²⁺ to ensure no Fe³⁺ is present?
Add 10 drops of NaOH to the solution
What is the conclusion if a brown ring is formed near the bottom of the test tube when Iron II sulphate and concentrated sulphuric acid are added?
The solution contains nitrate ions
What is the purpose of adding NaOH to the solution in the test for Fe 3+ ions?
To form a precipitate with Fe 3+
What is the significance of the white precipitate that dissolves in ammonia when testing for chloride ions?
The presence of chloride ions
What is the result of adding magnesium sulfate to a solution containing carbonate ions?
A white precipitate is formed
What is the purpose of adding dilute HCl when testing for sulfite ions?
To dissolve the precipitate formed
Learn about oxidation and reduction reactions, including the definition of oxidation and reduction, common oxidising agents, and their uses in various chemical reactions.
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