Question 1

What is the primary purpose of differential scanning calorimetry (DSC)?

Accepted Answer

To measure heat flow associated with phase transitions

Answer

To determine the molecular weight of substances

Answer

To measure electrical conductivity

Answer

To analyze the viscosity of liquids

Question 2

Which of the following can be analyzed using differential scanning calorimetry?

Accepted Answer

Melting points of materials

Answer

pH changes of a solution

Answer

Solubility of salts

Answer

Color changes of a solution

Question 3

In differential scanning calorimetry, which measurement is typically displayed on the y-axis of the heat flow curve?

Accepted Answer

Heat flow rate

Answer

Time

Answer

Pressure

Answer

Temperature

Question 4

What type of phase transition can be detected by differential scanning calorimetry?

Accepted Answer

Crystallization

Answer

Magnetic transition

Answer

Color change

Answer

Electrical breakdown

Question 5

What is one major application of differential scanning calorimetry in the pharmaceutical industry?

Accepted Answer

Stability testing of drug formulations

Answer

Analyzing particle size distribution

Answer

Measuring the surface area of powders

Answer

Determining the microbial content

Question 6

Which parameter does differential scanning calorimetry help determine about a polymer?

Accepted Answer

Glass transition temperature

Answer

Electrical conductivity

Answer

Molecular mass

Answer

Surface tension

Question 7

What does a spike in the DSC curve typically indicate?

Accepted Answer

A thermal event such as melting or crystallization

Answer

Decreased conductivity of the sample

Answer

No change in material properties

Answer

Increased viscosity of the sample

Question 8

What is the typical temperature range for conducting differential scanning calorimetry experiments?

Accepted Answer

From below room temperature to several hundred degrees Celsius

Answer

Only at room temperature

Answer

From 100 to 300 degrees Celsius

Answer

From 0 to 50 degrees Celsius

Question 9

Which type of sample holder is commonly used in differential scanning calorimetry?

Accepted Answer

Alumina crucibles

Answer

Plastic vials

Answer

Glass beakers

Answer

Metal containers

Question 10

What is the role of the reference material in differential scanning calorimetry?

Accepted Answer

To provide a baseline for comparison

Answer

To absorb excess heat

Answer

To react with the sample

Answer

To alter the temperature

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