CBSE NCERT NEET Chemistry Thermodynamics,Class11 Solutions,MCQ

Thermodynamics Mock Test-2

Question No:1
In which of the following pairs both properties are Intensive?

(a) Pressure, Temperature
(b) Density, volume
(c) Temperature, Density
(d) Pressure, Volume




Question No:2
Assertion: Work and Internal energy are not state functions.
Reason: The sum of q + w is a state function.

a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false




Question No:3
Assertion: Mass and volume are extensive properties.
Reason: \(\frac{ Mass}{ volume }\) is also an extensive property Volume (parameter).

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A,
(c) A Is true but R is false.
(d) Both A and R are false




Question No:4
Which one b true for the isobaric process?

(a) ΔP = 0
(b) Δq = 0
(c)ΔH=0
(d) ΔU = 0




Question No:5
A process in which volume remains constant

(a) Isochoric
(b) Isothermal
(c) Adiabatic
(d) isobaric




Question No:6
What is difference between change in enthalpy and change internal energy at constant volume?

(a) 0
(b) VdP
(c) -VdP
(d) +PdV




Question No:7
In which process, net work done by the gas is zero?

(a) Cyclic
(b) Isobaric
(c) Free expansion
(d) Adiabatic




Question No:8
Two moles of ideal gas expands spontaneously into vacuum. The work done will be

(a) Infinity
(b) 2J
(c) 9 J
(d) Zero.




Question No:9
Which of following is correct for free expansion of an ideal gas under adiabatic conditions?

(a) q = 0, ΔT ≠ 0, w = 0
(b) q ≠0, ΔT = 0, w = 0
(c) q = 0, ΔT = 0, w = 0
(d) q = 0, ΔT < 0, w ≠ 0




Question No:10
A system does 100 J work on surroundings by absorbing 150 J of heat Calculate the change in internal energy.

(a) 50J
(b) -50 J
(c) 100 J
(d) -100 J




Question No:11
A gas absorbs 200 J of heat and expands against the external pressure of 1.5 atm from a volume of 0.5 L to 1 L. Calculate change in internal energy.

(a)-55.5J
(b)-110.2J
(c) 92J
(d)+124.025J




Question No:12
The relationship between enthalpy change and Internal energy change is

(a) ΔH = ΔU + P ΔV
(b) ΔH = ΔU + V ΔP
(c) ΔH = ΔU – P ΔV
(d) ΔH = P ΔV – ΔU




Question No:13
Calculate the work performed when 2 moles of hydrogen expands isothermally and reversibly at 25 ℃from 15 to 45 L

(a)-1.309.70 Calories
(b) 1309.7 Calories
(c) 1210.2 Calories
(d) 1402.7 Calories




Question No:14
The enthalpy of formation of methane at constant pressure and 300 K is -75.83 KJ. What will be the heat of formation at constant volume? (R = 8.3JK-1 mol-1)

(a) 42 KJ
(b) 22 KJ
(c) -73.34 KJ
(d) 79.2 KJ




Question No:15
For an ideal gas expanding ad u bane ally in a vacuum

(a) ΔH = 0
(b) ΔH > 0
(c) ΔH<0
(d) None of these