Analytical Chemistry Quiz

What is the first step in quantitative chemical analysis?

• Choosing a method

• Defining the problem

• Performing necessary chemical separations

• Calibration and performing measurement

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

• Cost of analysis

• Number of samples to be analyzed

• Color of the sample

• Time required for analysis

What is the cornerstone of reliable analysis?

• Using advanced techniques

• Choosing the right equipment

• Obtaining a representative sample

• Performing calibration

What is the purpose of a method blank?

• To calibrate the instrument

• To check for contamination

• To prepare the sample

• To measure the analyte concentration

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

• Random sampling

• Judgmental sampling

• Systematic sampling

• Stratified sampling

What is the main goal of sample preservation?

• To ensure the sample retains its characteristics

• To increase the sample's volatility

• To enhance the analyte concentration

• To reduce the sample size

Which of the following is a common step in sample preparation?

• Dissolution

• Calibration

• Sampling

• Analysis

What type of analysis determines the presence of certain substances?

• Semi-qualitative analysis

• Qualitative analysis

• Statistical analysis

• Quantitative analysis

What is a significant source of error in analytical data?

• Instrument calibration

• Sampling errors

• Method validation

• Data interpretation

Which of the following is a type of sampling that collects samples at regular intervals?

• Judgmental sampling

• Systematic sampling

• Convenience sampling

• Random sampling