Introduction

Q. Which of the following units represents the largest amount of energy?

1. Electron volt
2. Joule
3. Erg
4. Calorie

Q. It is a general principle that the lower the energy a system contains, it is

1. More unstable
2. More stable
3. Unstable
4. Less stable

Q. Energy equivalent to one erg, one joule and one calorie is in the order

1. 1 erg > 1 joule > 1 calorie
2. 1 joule > 1 calorie > 1 erg
3. 1 erg > 1 calorie > 1 joule
4. 1 calorie > 1 joule > 1 erg

Q. With thermodynamics, one cannot determine the:

1. Speed of a reaction
2. Direction of a reaction
3. Extent of a reaction
4. Temperature at which a reaction will be spontaneous

Q. The unit of temperature in SI units is:

1. Celsius
2. Kelvin
3. Centigrade
4. Fahrenheit

Q. Which of the following is true for an adiabatic process?

1. $\Delta U=0$
2. $\Delta H=0$
3. $W=0$
4. $Q=0$

Q. Find the change in internal energy of 40 g of Argon gas when its change in temperature is 100 K.
(Given degree of freedom of argon is 3)

1. 4800 J
2. 5100 J
3. 3800 J
4. 1250 J

Q. Find the number of moles of ammonia gas taken when the kinetic energy change of the gas sample is 6250 J and change in temperature is given as 400 K.

1. 0.75
2. 0.52
3. 0.63
4. 0.85

Q. Which of the following molecule(s) has/have highest number of the features given below?
1. Have three traslational degrees of freedom.
2. Have two rotational degrees of freedom.
3. Triatomic and non linear
4. Triatomic and linear

1. $C{O}_2$
2. $S{O}_2$
3. $He$
4. $N_2$

Q. Which of the follwing degrees of freedom is applicable only at higher temperatures.

1. Rotational
2. Translational
3. None of these
4. Vibrational