1
JEE Main 2019 (Online) 12th April Morning Slot
+4
-1
A sample of an ideal gas is taken through the cyclic process abca as shown in the figure. The change in the internal energy of the gas along the path ca is –180 J. The gas absorbs 250 J of heat along the path ab and 60 J along the path bc. The work done by the gas along the path abc is:
A
120 J
B
130 J
C
100 J
D
140 J
2
JEE Main 2019 (Online) 12th April Morning Slot
+4
-1
Two moles of helium gas is mixed with three moles of hydrogen molecules (taken to be rigid). What is the molar specific heat of mixture at constant volume ? (R = 8.3 J/mol K)
A
21.6 J/mol K
B
17.4 J/mol K
C
15.7 J/mol K
D
19.7 J/mol K
3
JEE Main 2019 (Online) 12th April Morning Slot
+4
-1
When M1 gram of ice at –10oC (specific heat = 0.5 cal g–1 oC–1 ) is added to M2 gram of water at 50C, finally no ice is left and the water is at 0°C. The value of latent heat of ice, in cal g–1 is :
A
$${{50{M_2}} \over {{M_1}}} - 5$$
B
$${{50{M_2}} \over {{M_1}}}$$
C
$${{5{M_2}} \over {{M_1}}} - 5$$
D
$${{5{M_1}} \over {{M_2}}} - 50$$
4
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
One mole of ideal gas passes through a process where pressure and volume obey the relation $$P = {P_0}\left[ {1 - {1 \over 2}{{\left( {{{{V_0}} \over V}} \right)}^2}} \right]$$. Here P0 and V0 are constants. Calculate the change in the temperature of the gas if its volume changes form V0 to 2V0
A
$${3 \over 4}{{{P_0}{V_0}} \over R}$$
B
$${1 \over 2}{{{P_0}{V_0}} \over R}$$
C
$${5 \over 4}{{{P_0}{V_0}} \over R}$$
D
$${1 \over 4}{{{P_0}{V_0}} \over R}$$
JEE Main Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination