The State of a Gas

Q.

Which of these statements is/are true about internal energy (Eint) of a system of gas?

1. always increases as pressure increases

2. always decreases as temperature decreases

3. is proportional to volume

4. is proportional to the kinetic energy of the atoms in the system

Q. What are different ways of writing first law of thermodynamics

Q.

According to kinetic theory of gases, 0 kelvin is the temperature at which for an ideal gas

1. nearly all molecular motion becomes very rapid

2. pressure is not zero

3. volume is not zero

4. internal energy is zero

Q. The given figure shows the isotherms of a fixed mass of an ideal gas at three temperatures $T_A,T_B$ and $T_C$ then

1. $T_A>T_B>T_C$
2. $T_A<T_B<T_C$
3. $T_B<T_A<T_C$
4. $T_A=T_B=T_C$

Q.

Is it possible to change the temperature and pressure of a fixed mass of a gas, without changing its volume?

Q.

What is the effect of (i) temperature (ii) pressure on the coefficent of viscosity of the fluid?