A. 37°C
B. 42°C
C. 55°C
D. 410°C
Physics
Numerical value of Boltzmanns constant is…………..?
A. 1.38×10-31JK-1
B. 3.18×10-31JK-1
C. 3.18×10-23JK-1
D. 1.38×10-23JK-1
We prefer mercury as a thermometric substance because…………..?
A. Over a wide range of temperature its expansion is uniform
B. It does not stick to thermometer glass
C. It opaque to light
D. All of above
In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because……………?
A. Mercury takes a long time to contract
B. The amount of mercury use is very small
C. The capillary tube has a small constriction near the bulb
D. The capillary tube is very narrow
Which one is not an example of adiabatic process ?
A. rapid escape of air from a burst tyre
B. rapid expansion of air
C. conversion of water into ice in refrigerator
D. cloud formation in the atmosphere
If the volume of a gas is held constant and we increase its temperature then……………?
A. its pressure is constant
B. its pressure rises
C. its pressure falls
D. any of above
Boyles law helds for ideal gases in…………….?
A. isochoric processes
B. isobaric processes
C. isothermal processes
D. adiabatic processes
Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their………….?
A. volume
B. pressure
C. absolute temperature
D. time
If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of…………..?
A. Boyles law
B. Charles law
C. Ideal gas law
D. Avagadros law
The pressure exerted by a column of mercury 76cm high and at 0°C is called……………?
A. 1 atmosphere
B. 1 Newton per square meter
C. 1 Pascal
D. data is insufficient