Which analytical technique examines both physical and chemical properties to determine the presence of abnormal elements in a sample?

• A. Distillation
• B. Chromatography
• C. Filtration
• D. Qualitative analysis

Answer: (D)

Verified step by step guidance

1. Understand that the question is asking for an analytical technique that examines both physical and chemical properties to identify abnormal elements in a sample.
2. Recall that distillation is a separation technique based primarily on differences in boiling points (a physical property), so it mainly addresses physical properties.
3. Recognize that chromatography separates components based on their movement through a medium, which is also largely a physical separation method.
4. Note that filtration separates solids from liquids based on particle size, which is a physical process and does not provide chemical information.
5. Identify that qualitative analysis is a comprehensive approach that involves both physical observations and chemical tests to detect and characterize elements or compounds, making it the correct technique for determining the presence of abnormal elements.