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

A. To adjust for variations in heat flow

B. To calibrate the temperature sensor

C. To measure the sample mass accurately

D. To control the heating rate of the furnace

Everyday Science · Physics in Everyday Life · page 31 of 41

Heat & Thermodynamics MCQs with Answers

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Heat & Thermodynamics MCQs (301–310)

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301.
Calorie is the unit of ?
Correct Answer: D. Quantity of heat
One-liner
Calorie is the unit of quantity of heat (heat energy).
302.
The molar volume of CO2 is maximum at?
Correct Answer: C. 127°C and 1 atm
One-liner
The molar volume of CO2 is maximum at 127°C and 1 atm because volume increases with temperature and decreases with pressure.
303.
Which of the following have sharp melting point in solids?
Correct Answer: B. Diamond
One-liner
Diamond has a sharp melting point because it is a crystalline solid with a highly ordered atomic structure.
304.
The has the greatest intermolecular forces
Correct Answer: D. Solid
One-liner
Solid has the greatest intermolecular forces among the states of matter.
305.
What are solar panels mostly used for?
Correct Answer: A. Heating water
One-liner
Solar panels are mostly used for heating water, converting sunlight into thermal energy for domestic and industrial hot water needs.
306.
Which is not a property of a liquid?
Correct Answer: C. Melting point
One-liner
Melting point is not a property of a liquid; it is the temperature at which a solid changes into a liquid.
307.
What is the critical temperature of mercury?
Correct Answer: A. 4.15 K
One-liner
The critical temperature of mercury is 4.15 K, below which it becomes a superconductor.
308.
In a very low temperature which from the following will freeze at last?
Correct Answer: C. Sea water
One-liner
Sea water freezes last because the dissolved salts lower its freezing point below that of pure or fresh water.
309.
What is the primary purpose of baseline correction in differential scanning calorimetry (DSC)?
Correct Answer: A. To adjust for variations in heat flow
One-liner
The primary purpose of baseline correction in differential scanning calorimetry (DSC) is to adjust for variations in heat flow between the sample and reference pans, ensuring accurate thermal data.
310.
The process of emission of electrons from the hot metal surfaces is called?
Correct Answer: B. Thermionic emission
One-liner
The emission of electrons from a heated metal surface is called thermionic emission.

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Heat & Thermodynamics MCQs with Answers

Heat & Thermodynamics MCQs (301–310)

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