Preview Questions Chemical Researcher | Role Specific Skill

Question 1: What is the purpose of the "dead volume" in a chromatographic column?

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Choose only one option

It serves as a storage space for solvents

It increases the efficiency of the separation

It reduces the interaction between the mobile and stationary phases

It holds the sample before it enters the stationary phase

Question 2: In a research report, what is the most appropriate way to document experimental observations that did not align with expectations?

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Describe the observations in detail, suggest potential reasons, and provide a hypothesis for future experiments

Ignore unexpected results and focus only on expected outcomes

Present the discrepancies as errors without providing further insight

Mention them briefly without analysis

Question 3: When conducting an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) analysis, what type of ions are typically detected?

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Ions produced by the sample as it is atomized in the plasma

Neutral atoms

Only ions with high mass-to-charge ratios

Only the lightest ions in the sample

Question 4: In a chemical reaction, what is the primary concern when dealing with exothermic reactions in terms of safety?

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Preventing the build-up of excessive heat and pressure that could lead to a runaway reaction

Maintaining a constant concentration of reactants throughout the reaction

Ensuring the reaction is completely inert to avoid toxicity

Monitoring the product yield and quality

Question 5: How would you approach analyzing the risks associated with the transportation of hazardous chemicals?

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By relying on generic guidelines without tailoring to specific chemical characteristics

By focusing only on the shipping company's operational efficiency

By assessing the chemical properties of the substances, transportation conditions, and the safety measures in place

By considering the cost of transportation and the shortest route

Question 6: What type of sample preparation is most commonly required for analysis by Mass Spectrometry?

Which action should you take?

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Precipitation of insoluble substances

Ionization of the sample to generate charged particles

Heating the sample to vaporize volatile components

Dilution of the sample with a solvent