TGA and Polarography Quiz

What does TGA stand for?

• Thermal Gas Analysis

• Thermogravimetric Analysis

• Thermal Gradient Analysis

• Thermal Gravimetric Assessment

The principle of TGA is based on measuring changes in:

• Temperature

• Mass

• Volume

• Pressure

In DTA, the temperature difference is measured between:

• Sample and reference

• Sample and atmosphere

• Reference and atmosphere

• Sample and detector

Which of the following is a common application of TGA?

• Determining thermal stability of materials

• Measuring molecular weight

• Assessing solubility

• Identifying functional groups

In DTA, an endothermic reaction is indicated by:

• A peak upward

• A peak downward

• No change in temperature

• A continuous increase in temperature

Which component is essential for measuring mass changes in TGA?

• Monochromator

• Balance

• Thermocouple

• Detector

What type of furnace is commonly used in TGA?

• Electric furnace

• Gas furnace

• Pyrolysis furnace

• Resistance furnace

Which of the following factors can affect TGA results?

• Heating rate

• Sample size

• Atmosphere in the furnace

• All of the above

What type of atmosphere is often used in TGA to prevent oxidation?

• Air

• Nitrogen

• Argon

• Both b and c

Calcium oxalates decompose at elevated temperatures to form:

• Calcium carbonate

• Calcium oxide

• Calcium hydroxide

• Calcium sulfate