WB JEE 2008 | Heat and Thermodynamics Question 3 | Physics

WB JEE 2008

MCQ (Single Correct Answer)

-0.25

An experiment takes 10 minutes to raise temperature of water from 0$$^\circ$$C to 100$$^\circ$$C and another 55 minutes to convert it totally into steam by a stabilized heater. The latent heat of vaporization comes out to be

530 cal/g

540 cal/g

550 cal/g

560 cal/g

WB JEE 2008

MCQ (Single Correct Answer)

-0.25

At what temperature will the rms speed of air molecules be double that of NTP?

519$$^\circ$$C

619$$^\circ$$C

719$$^\circ$$C

819$$^\circ$$C

WB JEE 2008

MCQ (Single Correct Answer)

-0.25

When the room temperature becomes equal to the dew point, the relative humidity of the room is

100%

zero%

70%

85%

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

Six molecules of an ideal gas have velocities 1, 3, 5, 5, 6 and 5 m/s respectively. At any given temperature, if $$\mathrm{\overline V}$$ and $$\mathrm{V_{rms}}$$ represent average and rms speed of the molecules, then

$$\mathrm{\overline V = 5}$$ m/s

$$\mathrm{{V_{rms}} > \overline V}$$

$$\mathrm{V_{rms}^2 < {\overline V ^2}}$$

$$\mathrm{{V_{rms}} = \overline V}$$

PREVIOUS NEXT

WB JEE Subjects