Question 1:

Which technique is commonly used to identify the presence of specific elements in a sample?

Explanation: Spectroscopy is commonly used to identify the presence of specific elements in a sample. It involves the measurement of the interaction between electromagnetic radiation and matter to determine the elemental composition of a sample.

Question 2:

What is the purpose of a flame test in qualitative analysis?

Explanation: The purpose of a flame test in qualitative analysis is to identify elements based on their characteristic flame colors. When certain elements are heated in a flame, they emit unique colors of light, allowing for the identification of those elements.

Question 3:

What does the term "qualitative analysis" refer to?

Explanation: The term "qualitative analysis" refers to the analysis of the presence or absence of substances. It focuses on identifying the components or characteristics of a sample without quantifying their amounts.

Question 4:

What is the purpose of a reagent in qualitative analysis?

Explanation: The purpose of a reagent in qualitative analysis is to produce a specific reaction with a target compound. Reagents are carefully selected based on their ability to generate characteristic reactions or precipitates that aid in the identification of specific compounds.

Question 5:

Which technique is commonly used to identify organic compounds in qualitative analysis?

Explanation: Infrared spectroscopy is commonly used to identify organic compounds in qualitative analysis. It measures the absorption of infrared radiation by organic molecules, providing information about their functional groups and structural features.