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Volumetric Analysis (Titration) | Week 13 Topics1 Quiz
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Heat of Neutralization & Redox Titrations | Week 22 Topics1 Quiz
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Test for Common Gases | Week 32 Topics1 Quiz
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Qualitative Analysis I | Week 43 Topics1 Quiz
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Qualitative Analysis II | Week 52 Topics1 Quiz
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Qualitative Analysis III | Week 63 Topics1 Quiz
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Qualitative Analysis IV - Anions | Week 71 Topic1 Quiz
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Test for Fat and Oil; Protein; Starch | Week 83 Topics1 Quiz
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Petroleum I | Week 94 Topics1 Quiz
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Petroleum II | Week 105 Topics1 Quiz
Lesson Progress
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Topic Content:
- The Biuret Test
- The Millons Test
- The Xanthoproteic Test
The Biuret Test:
| Test | Observation | Inference |
| Sample + NaOH(aq) solution + CuSO4(aq) solution in drops followed by thorough shaking + warming | Violet or purple precipitate formed | Sample is protein |
The Millons Test:
| Test | Observation | Inference |
| Sample solution + millions reagent + heat | White precipitate is formed. Precipitate turns deep red or brick red on heating. | Protein is present |
The Xanthoproteic Test:
| Test | Observation | Inference |
| Sample + conc. HNO3(aq) in drops + heat + few drops of NaOH(aq) or NH4OH(aq) | Yellow precipitate, which turns orange on addition of NaOH(aq) or NH4OH(aq) | Sample is protein |
Responses