Practice Detection Of Other Elements (8.9.2) - Organic chemistry – some Basic Principles and Techniques

Practice: Detection of Other Elements

Lesson 8.9.2Organic chemistry – some Basic Principles and Techniques

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8 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What color indicates the presence of nitrogen in Lassaigne's test?
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Remember the phrase 'Blue means nitrogen, that's the clue!'
Question 2.
What is formed when sulfur is tested with lead acetate?
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Think of 'black' and 'sulfide'.
3Question 3.
What does Lassaigne's test specifically allow us to detect?
- Only nitrogen
- Sulfur and halogens
- Nitrogen, sulfur, and halogens
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Think of the variety of elements it checks for!
4Question 4.
True or False? A white precipitate with silver nitrate indicates the presence of iodine.
- True
- False
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Recall the specific colors for each halogen!
Question 5.
Describe a scenario where an organic compound is tested for nitrogen, sulfur, and phosphorus using Lassaigne's test and discuss the expected results if all elements are present.
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Think about each element's unique color and what combination you would see.
Question 6.
What could happen if contamination occurred during the Lassaigne's test? Analyze the potential outcomes.
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Consider how unexpected colors or precipitates would confuse the test!

4 more questions in this section. Enroll free to practise them all.