What is the primary purpose of Lassaigne's Test?

Testing for Nitrogen and Sulfur Compounds

Interactive Video
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Chemistry
•
11th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To measure the pH of a solution
To detect metals in inorganic compounds
To determine the boiling point of a compound
To identify the presence of nitrogen, sulfur, and halogens in organic compounds
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in preparing the Sodium Fusion Extract?
Cooling the compound in ice
Adding silver nitrate to the compound
Mixing the compound with hydrochloric acid
Heating the organic compound with sodium metal in a fusion tube
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which compound is formed if nitrogen is present in the organic compound during the preparation of SFE?
Sodium cyanide
Sodium halide
Sodium thiocyanate
Sodium sulfide
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What color indicates the presence of nitrogen when testing with SFE?
Prussian blue
Pale yellow
Deep violet
Black
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which reagent is added to SFE to test for nitrogen?
Lead acetate
Silver nitrate
Nitric acid
Ferrous sulfate
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What indicates the presence of sulfur when using the nitroprusside test?
Pale yellow precipitate
Curdy white precipitate
Deep violet coloration
Prussian blue coloration
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of adding lead acetate to SFE if sulfur is present?
Formation of a black precipitate
No reaction
Formation of a white precipitate
Formation of a red precipitate
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