What is the color of precipitates of AgBr?
Correct answer: D. Light yellow
- A. Light brown
- B. Light green
- C. Light Blue
- D. Light yellow
Explanation
Silver bromide forms a pale cream or light-yellow precipitate when bromide ions react with silver ions, so light yellow is the closest option. Silver chloride is white and silver iodide is yellow, which can lead students to choose the wrong precipitate colour.
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About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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