Preview Questions Chemical Researcher | Role Specific Skill

Question 1: In experimental chemical research, how can one ensure the reproducibility of the results?

Which action should you take?

Choose only one option

Disregard minor procedural errors as they do not affect the outcome

Repeat the experiment only once

Record only the positive outcomes and discard negative ones

Use detailed protocols, proper calibration, and consistent experimental conditions to repeat the experiment multiple times

Question 2: How does an ion-selective electrode (ISE) work to measure the concentration of specific ions in a solution?

Which action should you take?

Choose only one option

It separates ions based on their charge and size

It measures the absorption of light at specific wavelengths

It determines the voltage difference generated by the selective ion exchange process

It measures the current produced by the ion's movement through a membrane

Question 3: How is the concept of "inherent safety" applied in hazard analysis for chemical processes?

Which action should you take?

Choose only one option

By relying solely on protective equipment to mitigate risk

By increasing the chemical reactants to ensure process efficiency

By designing processes that minimize or eliminate hazards rather than controlling them through safety measures

By conducting detailed safety audits after the process is running

Question 4: How does a Material Safety Data Sheet (MSDS) contribute to the safety of a chemical research laboratory?

Which action should you take?

Choose only one option

It provides a list of chemicals that can be safely used in the lab

It provides the cost of chemicals used in experiments

It describes the chemical hazards, proper handling, emergency procedures, and disposal methods

It replaces the need for lab safety training

Question 5: When performing a titration, how can you determine the equivalence point in an acid-base reaction?

Which action should you take?

Choose only one option

By using a pH meter to identify the point where the pH changes sharply

By adding an excess of acid or base until the color changes

By observing the volume of titrant added

By calculating the moles of acid and base present

Question 6: How does a flame ionization detector (FID) work in gas chromatography?

Which action should you take?

Choose only one option

It analyzes the time taken for the sample to reach the detector

It detects the presence of ions by measuring the resistance in the mobile phase

It detects the heat produced by the sample during combustion

It detects charged particles formed by the sample combustion in the flame