Podcast
Questions and Answers
What is the defining characteristic of an oxidising agent?
What is the defining characteristic of an oxidising agent?
- It remains neutral
- It loses electrons
- It is always a metal
- It gains electrons (correct)
What is the purpose of adding dilute HCl in the test for sulfites?
What is the purpose of adding dilute HCl in the test for sulfites?
- To oxidise the sulphite to sulfate
- To form a white precipitate
- To reduce the sulphite to sulphur
- To dissolve the white precipitate (correct)
What is the colour of the final product when chlorine water is added to potassium iodide solution?
What is the colour of the final product when chlorine water is added to potassium iodide solution?
- Colourless
- Red-Brown (correct)
- Green
- Orange
Which of the following is NOT a common oxidising agent?
Which of the following is NOT a common oxidising agent?
What is the purpose of adding BaCl₂ in the test for sulfites?
What is the purpose of adding BaCl₂ in the test for sulfites?
What is the defining characteristic of a reducing agent?
What is the defining characteristic of a reducing agent?
What is the test for Fe²⁺ to ensure no Fe³⁺ is present?
What is the test for Fe²⁺ to ensure no Fe³⁺ is present?
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?
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?
What is the purpose of adding NaOH to the solution in the test for Fe 3+ ions?
What is the purpose of adding NaOH to the solution in the test for Fe 3+ ions?
What is the significance of the white precipitate that dissolves in ammonia when testing for chloride ions?
What is the significance of the white precipitate that dissolves in ammonia when testing for chloride ions?
What is the result of adding magnesium sulfate to a solution containing carbonate ions?
What is the result of adding magnesium sulfate to a solution containing carbonate ions?
What is the purpose of adding dilute HCl when testing for sulfite ions?
What is the purpose of adding dilute HCl when testing for sulfite ions?
