JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
An ideal gas is allowed to expand from \(1\, L\) to \(10\, L\) against a constant external pressure of \(1\,bar\). The work done in \(kJ\) is
- A \(-8\)
- B \(-9\)
- C \(-2\)
- D \(+10\)
Answer & Solution
Correct Answer
(B) \(-9\)
Step-by-step Solution
Detailed explanation
\(W = - {P_{ext}}\,\left( {{V_2} - {V_1}} \right)\)
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 Chemistry
- Salicylaldehyde is synthesized from phenol, when reacted with _______.JEE Mains 2024 Hard
- Given below are two statements: Statement \(I\) : Sulphanilic acid gives esterification test for carboxyl group. Statement \(II\) : Sulphanilic acid gives red colour in Lassigne's test for extra element detection. In the light of the above statements, choose the most appropriate answer from the options given below :JEE Mains 2023 Hard
- The dipole moments of \(\mathrm{CCl}_{4}, \mathrm{CHCl}_{3}\) and \(\mathrm{CH}_{4}\) are in the orderJEE Mains 2020 Medium
- The ratio of number of water molecules in Mohr's salt and potash alum is \(....\,\times 10^{-1}\)JEE Mains 2021 Hard
- Two \(5\) molal solutions are prepared by dissolving a non-electrolyte, non-volatile solute separately in the solvents \(X\) and \(Y\). The molecular weights of the solvents are \(M_X\) and \(M_Y\), respectively where \(M_X\, = \frac{3}{4} M_Y\). The relative lowering of vapour pressure of the solution in \(X\) is \(''m''\) times that of the solution in \(Y\). Given that the number of moles of solute is very small in comparison to that of solvent, the value of \(''m''\) isJEE Mains 2018 Hard
- Phthalimide is made to undergo following sequence of reactions. (Image) Total number of \(\pi\) bonds present in product ' \(P\) ' is _______.
JEE Mains 2024 Medium
More PYQs from JEE Mains
- A capacitor has capacitance \(5 \mu F\) when it's parallel plates are separated by air medium of thickness \(d\). A slab of material of dielectric constant \(1.5\) having area equal to that of plates but thickness \(\frac{ d }{2}\) is inserted between the plates. Capacitance of the capacitor in the presence of slab will be \(..........\mu F\)JEE Mains 2023 Medium
- Choose the incorrect trend in the atomic radius \((\mathrm{r})\) of the elements :JEE Mains 2025 Easy
- If the line \(\frac{{x - 2}}{3} = \frac{{y + 1}}{2} = \frac{{z - 1}}{1}\) intersects the plane \(2x + 3y -z + 13 = 0\) at a point \(P\) and the plane \(3x + y + 4z = 16\) at a point \(Q\), then \(PQ\) is equal toJEE Mains 2019 Hard
- Your friend is having eye sight problem. She is not able lo see clearly a distant uniform window mesh and it appears to her as non-uniform and distorted. The doctor diagnosed the problem asJEE Mains 2021 Medium
- A potentiometer \(PQ\) is set up to compare two resistances as shown in the figure. The ameter \(A\) in the circuit reads \(1.0\, A\) when two way key \(K_3\) is open. The balance point is at a length \(l_1\, cm\) from \(P\) when two way key \(K_3\) is plugged in between \(2\) and \(1\) , while the balance point is at a length \(l_2\, cm\) from \(P\) when key \(K_3\) is plugged in between \(3\) and \(1\) . The ratio of two resistances \(\frac{{{R_1}}}{{{R_2}}}\) is found to be
JEE Mains 2017 Medium - A sample contains mixture of helium and oxygen gas. The ratio of root mean square speed of helium and oxygen in the sample is _______.JEE Mains 2024 Hard