Analytical Chemistry Quiz

What is the first step in quantitative chemical analysis?

• Choosing a method

• Defining the problem

• Performing measurements

• Preparing the sample

Which of the following is NOT a factor to consider when choosing an analytical method?

• Cost of analysis

• Color of the sample

• Accuracy required

• Time required for analysis

What is the cornerstone of reliable analysis?

• Choosing the right equipment

• Obtaining a representative sample

• Performing necessary chemical separations

• Calibrating instruments

What is the purpose of a method blank?

• To calibrate the instrument

• To prepare the sample

• To measure the analyte concentration

• To check for contamination during analysis

Which type of sampling involves selecting samples based on available information about the target population?

• Systematic sampling

• Stratified sampling

• Random sampling

• Judgmental sampling

What is the main goal of sample preservation?

• To ensure the sample retains its characteristics

• To enhance the analyte concentration

• To reduce the sample size

• To increase the sample's temperature

Which of the following is a step in preparing a sample for analysis?

• Performing chemical separations

• Obtaining a representative sample

• Defining the problem

• Calculating the results

What is the purpose of calibration in the analytical process?

• To analyze the data

• To select the method

• To ensure accurate measurements

• To prepare the sample

What type of analysis determines the presence of specific compounds?

• Semi-qualitative analysis

• Qualitative analysis

• Statistical analysis

• Quantitative analysis

Which of the following is a common source of contamination during sampling?

• Using clean containers

• Temperature control

• Environmental factors

• Proper labeling