1
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
N moles of a diatomic gas in a cylinder are at a temperature T. Heat is supplied to the cylinder such that the temperature remains constant but n moles of the diatomic gas get converted into monoatomic gas. What is the change in the total kinetic energy of the gas ?
A
$${1 \over 2}$$ nRT
B
0
C
$${3 \over 2}$$ nRT
D
$${5 \over 2}$$ nRT
2
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
For the P-V diagram given for an ideal gas,

out of the following which one correctly represents the T-P diagram ?
A
B
C
D
3
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
In an experiment, a sphere of aluminium of mass 0.20 kg is heated upto 150oC. Immediately, it is put into water of volume 150 cc at 27oC kept in a calorimeter of water equivalent to 0.025 kg. Final temperature of the system is 40oC. The specific heat of aluminium is : (take 4.2 Joule = 1 calorie)
A
378 J/kg $$-$$oC
B
315 J/kg $$-$$oC
C
476 J/kg $$-$$oC
D
434 J/kg $$-$$oC
4
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
A compressive force, F is applied at the two ends of a long thin steel rod. It is heated, simultaneously, such that its temperature increases by $$\Delta$$T. The net change in its length is zero. Let $$\ell$$ be the length of the rod, A its area of cross-section,Y its Young’s modulus, and $$\alpha$$ its coefficient of linear expansion. Then, F is equal to :
A
$$\ell$$2 Y$$\alpha$$ $$\Delta$$T
B
$$\ell$$A Y$$\alpha$$ $$\Delta$$T
C
A Y$$\alpha$$ $$\Delta$$T
D
$${{AY} \over {\alpha \,\Delta T}}$$
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