Testing for Nitrogen and Sulfur Compounds

Testing for Nitrogen and Sulfur Compounds

Assessment

Interactive Video

Chemistry

11th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial by Adi Chavartan from adichemistry.com introduces Lassaigne's test, a method to detect elements like nitrogen, sulfur, and halogens in organic compounds. The process involves preparing a sodium fusion extract (SFE) and conducting specific tests to identify the presence of these elements. The tutorial covers the preparation of SFE, testing for nitrogen using Prussian blue coloration, detecting sulfur through nitroprusside and lead acetate tests, and identifying halogens by observing precipitate reactions. The video concludes with a call to visit the website for more information and practice questions.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of Lassaigne's Test?

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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