1
GATE ME 2023
MCQ (Single Correct Answer)
+2
-0.66
Which one of the following statements is FALSE?
A
For an ideal gas, the enthalpy is independent of pressure. 
B
For a real gas going through an adiabatic reversible process, the process equation is given by 𝑃𝑉𝛾 = constant, where P is the pressure, V is the volume and 𝛾 is the ratio of the specific heats of the gas at constant pressure and constant volume.
C
For an ideal gas undergoing a reversible polytropic process 𝑃𝑉1.5 = constant, the equation connecting the pressure, volume and temperature of the gas at any point along the process is $\rm \frac{P}{R}=\frac{mT}{V}$, where 𝑅 is the gas constant and π‘š is the mass of the gas. 
D
Any real gas behaves as an ideal gas at sufficiently low pressure or sufficiently high temperature.
2
GATE ME 2023
MCQ (Single Correct Answer)
+2
-0.66

Consider a fully adiabatic piston-cylinder arrangement as shown in the figure. The piston is massless and cross-sectional area of the cylinder is 𝐴. The fluid inside the cylinder is air (considered as a perfect gas), with Ξ³ being the ratio of the specific heat at constant pressure to the specific heat at constant volume for air. The piston is initially located at a position 𝐿1. The initial pressure of the air inside the cylinder is 𝑃1 ≫ 𝑃0, where 𝑃0 is the atmospheric pressure. The stop S1 is instantaneously removed and the piston moves to the position 𝐿2, where the
equilibrium pressure of air inside the cylinder is 𝑃2 ≫ 𝑃0.

What is the work done by the piston on the atmosphere during this process?

GATE ME 2023 Thermodynamics - First Law of Thermodynamics Question 1 English
A
0
B
P0A(L2 - L1)
C
$\rm P_1AL_1ln\frac{L_1}{L_2}$
D
$\rm \frac{(P_2L_2-P_1L_1)A}{(1-\gamma)}$
3
GATE ME 2023
Numerical
+2
-0

Consider a mixture of two ideal gases, X and Y, with molar masses MΜ…X = 10 kg/kmol and MΜ…Y = 20 kg/kmol, respectively, in a container. The total pressure in the container is 100 kPa, the total volume of the container is 10 m3 and the temperature of the contents of the container is 300 K. If the mass of gas-X in the container is 2 kg, then the mass of gas-Y in the container is ____ kg. (Rounded off to one decimal place)

Assume that the universal gas constant is 8314 J kmol-1K-1.

Your input ____
4
GATE ME 2023
MCQ (Single Correct Answer)
+1
-0.33
He did not manage to fix the car himself, so he _______ in the garage.
A
got it fixed
B
getting it fixed
C
gets fixed
D
got fixed
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12