Analytical Chemistry Quiz Test I

What is one method used to express accuracy in analytical chemistry?

• Standard deviation

• Signal-to-noise ratio

• Relative error

• Coefficient of variation

Gross errors in analytical data are typically caused by____.

• Instrument malfunction

• Inaccurate calibration

• Incorrect calculations

• Human mistakes during measurement

The estimation of glucose using Fehling’s solution is primarily based on____.

• Redox titration

• Acid-base titration

• Precipitation reaction

• Complexometric titration

The reagent that commonly oxidizes glucose to gluconic acid during its estimation is______.

• Benedict's solution

• Fehling's solution

• Tollen's reagent

• Barfoed's reagent

Thermogravimetric analysis (TGA) is based on____.

• Mass change

• Volume change

• Heat flow

• Conductivity

The component used to measure heat flow in DSC is____.

• Thermocouple

• Balance

• Microscope

• Calorimeter

Principle of colorimetry and spectrophotometry______.

• Conductivity

• Light absorption

• Mass change

• Volume change

Unit of absorbance___.

• %T

• M

• AU

• g/mL

Elution in column chromatography____.

• Packing column

• Washing impurities

• Separating components

• Analyzing components

Solvent for non-polar compounds in TLC_______.

• Water

• Hexane

• Ethanol

• Acetic acid