WBJEE · Physics · Thermodynamics
The perfect gas equation for \(4 \mathrm{g}\) of hydrogen gas is
- A \(p V=R T\)
- B \(p V=2 R T\)
- C \(p V=\frac{1}{2} R T\)
- D \(p V=4 R T\)
Answer & Solution
Correct Answer
(B) \(p V=2 R T\)
Step-by-step Solution
Detailed explanation
Mass of gas \(=4 \mathrm{g} \quad\) (given) From pertect gas equation \[ p V=n R T \] where \(n=\) number of moles here, \(\left(n=\frac{4}{2}=2\right)\) \(\therefore \quad p V=2 R T\) It will be the perfect gas equation for \(4 \mathrm{g}\) of hydrogen.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- In Young's experiment for the interference of light, the separation between the slits is \(d\) and the distance of the screen from the slits is \(D\). If \(D\) is increased by \(0.5 \%\) and \(d\) is decreased by \(0.3 \%\) then for the light of a given wavelength, which one of the following is true? "The fringe width.........WBJEE 2019 Medium
- In a triangle \(A B C\), the sides \(A B\) and \(A C\) are represented by the vectors \(3 \mathrm{i}+\mathrm{j}+\mathrm{k}\) and \(\mathrm{i}+2 \mathrm{j}+\mathrm{k}\), respectively. Calculate the angle \(\angle A B C\)WBJEE 2018 Medium
- An object placed at a distance of \(16 \mathrm{cm}\) from a \(\begin{array}{llll}\text { convex lens } & \text { produces } & \text { an image } & \text { of }\end{array}\) magnification \(m(m>1)\). If the object is moved towards the lens by \(8 \mathrm{cm}\), then again an image of magnification \(m\) is obtained. The numerical value of the focal length of the lens isWBJEE 2013 Hard
- A magnetic field \(B=2 t+4 t^{2}\) (where, \(t_{x}\) time) is applied perpendicular to the plany of a circular wire of radius \(r\) and resistance
R. If all the units are in SI the electric charge that flows through the circular wire during \(t=0 \mathrm{s}\) to \(t=2 \mathrm{s}\) isWBJEE 2013 Medium - A fighter plane, flying horizontally with a speed \(360 \mathrm{kmph}\) at an altitude of \(500 \mathrm{~m}\) drops a bomb for a target straight ahead of it on the ground. The bomb .should be dropped at what approximate distance ahead of the target ? Assume that acceleration due to gravity \((\mathrm{g})\) is \(10 \mathrm{~ms}^{-2}\). Also neglect air dragWBJEE 2020 Medium
- A plano-convex lens \((f=20 \mathrm{~cm})\) is silvered at plane surface. Now focal length will be :WBJEE 2010 Easy
More PYQs from WBJEE
- In a mercury thermometer, the ice point (lower fixed point) is marked as \(10^{\circ}\) and the steam point (upper fixed point) is marked as \(130^{\circ}\). At \(40^{\circ} \mathrm{C}\) temperature, what will this thermometer read?WBJEE 2012 Easy
- A \(5 \mu F\) capacitor is connected in series with \(10 \mathrm{\mu F}\) capacitor. When a \(300 \mathrm{v}\) potentid dillerence is applied across this combination, the total energy stored in the capacitors isWBJEE 2015 Medium
-
What will be the equivalent resistance between the terminals A and B of the infinite resistive network shown in the figure?WBJEE 2020 Hard - For nuclei with mass number close to 119 and 238 , the binding energies per nucleon are approximately \(7.6 \mathrm{MeV}\) and \(8.6 \mathrm{MeV}\) respectively. If a nucleus of mass number 238 breaks into two nuclei of nearly equal masses, what will be the approximate amount of energy released in the process of fission?WBJEE 2020 Medium
- Two metal wires of identical dimensions are connected in series. If \(\sigma_{1}\) and \(\sigma_{2}\) are the electrical conductivities of the metal wires respectively, the effective conductivity of the combination isWBJEE 2021 Easy
- The energy of an electron in first Bohr orbit of \(\mathrm{H}\)-atom is \(-13.6 \mathrm{eV}\). The possible energy value of electron in the excited state of \(\mathrm{Li}^{2+}\) isWBJEE 2011 Medium