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Questions and Answers
Which type of sampling eliminates questions of bias in selection?
Which type of sampling eliminates questions of bias in selection?
- Random (correct)
- Stratified
- Systematic
- Composite
What is used to separate aqueous and nonaqueous liquids into two samples?
What is used to separate aqueous and nonaqueous liquids into two samples?
- Pipet
- Beaker
- Separatory funnel (correct)
- Rotary evaporator
Which method is commonly used to separate mixtures of liquids and solids prior to analysis?
Which method is commonly used to separate mixtures of liquids and solids prior to analysis?
- Filtering
- Decanting
- Centrifuging
- All of the above (correct)
What is a common pre-treatment method for solid samples prior to analysis?
What is a common pre-treatment method for solid samples prior to analysis?
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Which technique is often considered expensive and the last resort for the decomposition and dissolution of solids during sample preparation?
Which technique is often considered expensive and the last resort for the decomposition and dissolution of solids during sample preparation?
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