1
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
$${1 \over 4}{{{P_0}{V_0}} \over R}$$
2
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
Light is incident normally on a completely absorbing surface with an energy flux of 25 W cm–2. If the surface has an area of 25 cm2, the momentum transferred to the surface in 40 min time duration will be :
A
6.3 × 10–4 Ns
B
5.0 × 10–3 Ns
C
1.4 × 10–6 Ns
D
3.5 × 10–6 Ns
3
JEE Main 2019 (Online) 10th April Evening Slot
+4
-1
When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by $$\Delta$$T. the heat required to produce the same change in temperature, at a constant pressure is :
A
$${7 \over 5}Q$$
B
$${3 \over 2}Q$$
C
$${2 \over 3}Q$$
D
$${5 \over 3}Q$$
4
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
A cylinder with fixed capacity of 67.2 lit contains helium gas at STP. The amount of heat needed to raise the temperature of the gas by 20°C is : [Given that R = 8.31 J mol–1 K–1]
A
374 J
B
700 J
C
748 J
D
350 J
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