1

JEE Main 2021 (Online) 24th February Evening Shift

Numerical

+4

-1

The root mean square speed of molecules of a given mass of a gas at 27$$^\circ$$C and 1 atmosphere pressure is 200 ms

^{$$-$$1}. The root mean square speed of molecules of the gas at 127$$^\circ$$C and 2 atmosphere pressure is $${{x \over {\sqrt 3 }}}$$ ms^{$$-$$1}. The value of x will be _________.Your input ____

2

JEE Main 2020 (Online) 6th September Evening Slot

Numerical

+4

-0

An engine operates by taking a monoatomic ideal gas through the cycle shown in the figure. The
percentage efficiency of the engine is close to __________.

Your input ____

3

JEE Main 2020 (Online) 6th September Morning Slot

Numerical

+4

-0

Initially a gas of diatomic molecules is contained in a cylinder of volume V

_{1}at a pressure P_{1}and temperature 250 K. Assuming that 25% of the molecules get dissociated causing a change in number of moles. The pressure of the resulting gas at temperature 2000 K, when contained in a volume 2V_{1}is given by P_{2}. The ratio $${{{P_2}} \over {{P_1}}}$$ is ________.Your input ____

4

JEE Main 2020 (Online) 6th September Morning Slot

Numerical

+4

-0

A part of a complete circuit is shown in the figure. At some instant, the value of current I is 1A and
it is decreasing at a rate

of 10

of 10

^{2}A s^{–1}. The value of the potential difference V_{P}– V_{Q}, (in volts) at that instant, is _________.Your input ____

Questions Asked from Heat and Thermodynamics (Numerical)

Number in Brackets after Paper Indicates
No. of Questions

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