Preview Questions Chemical Researcher | Role Specific Skill

Question 1: What is the purpose of a "buffer solution" in pH-based chemical analysis?

Which action should you take?

Choose only one option

To neutralize excess acid or base in the sample

To increase the solubility of a sample in the solvent

To adjust the sample to a specific ionic strength

To maintain a constant pH during the analysis

Question 2: What is the primary purpose of using a blank in spectroscopic measurements during chemical experiments?

Which action should you take?

Choose only one option

To adjust for temperature fluctuations

To ignore any interference caused by the solvent

To subtract the baseline signal from the sample measurements

To verify the calibration of the spectrometer

Question 3: What is the purpose of conducting a "sensitivity analysis" in safety and hazard assessment?

Which action should you take?

Choose only one option

To quantify the likelihood of multiple hazards occurring simultaneously

To determine how changes in variables affect the outcome of risk assessments

To assess the cost-effectiveness of safety measures

To test the efficiency of safety equipment under different conditions

Question 4: What is the main disadvantage of using flame photometry for trace metal analysis?

Which action should you take?

Choose only one option

It requires high sample volumes for accurate analysis

It can only analyze metals with atomic number greater than 20

It is unable to differentiate between similar metals with identical flame emission spectra

It has poor sensitivity for detecting metals in low concentrations

Question 5: How do you ensure clarity when presenting complex chemical data in a report?

Which action should you take?

Choose only one option

Only present data as raw figures without any explanation

Limit data presentation to qualitative descriptions

Use jargon and technical terms without explanations

Provide detailed legends and explanations for graphs and tables

Question 6: What is the role of a Process Safety Incident (PSI) investigation in hazard analysis?

Which action should you take?

Choose only one option

To reduce the production capacity of chemical processes

To analyze the root causes of incidents, develop corrective actions, and prevent future occurrences

To review the environmental impact of a process

To determine the number of safety personnel required