MHT CET · Chemistry · Thermodynamics (C)
“The mass and energy both are conserved in an isolated system”, is the statement of
- A Second law of thermodynamics
- B Third law of thermodynamics
- C Modified first law of thermodynamics
- D First law of thermodynamics
Answer & Solution
Correct Answer
(C) Modified first law of thermodynamics
Step-by-step Solution
Detailed explanation
“The mass and energy both are conserved in an isolated system” is the statement of modified first law of thermodynamics. According to this law, if a certain amount of one kind of energy is consumed to that the total energy in the universe remains constant.
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
- Oxidation potential of unimoles of calomel isMHT CET 2010 Hard
- A monobasic acid is \(5 \%\) dissociated in its 0.02 M solution. Calculate the dissociation constant of acid.MHT CET 2024 Easy
- What is standard \(\mathrm{N} \equiv \mathrm{N}\) bond enthalpy from following reaction? \(\mathrm{N}_{2_{(\mathrm{g})}}+3 \mathrm{H}_{2_{(\mathrm{g})}} \longrightarrow 2 \mathrm{NH}_{3_{(\mathrm{g})}} \Delta \mathrm{H}^{\circ}=-83 \mathrm{KJ}\) \(\left(\Delta \mathrm{H}^{\circ}{ }_{(\mathrm{H}-\mathrm{H})}=435 \mathrm{~kJ}, \Delta \mathrm{H}^{\circ}{ }_{(\mathrm{N}-\mathrm{H})}=389 \mathrm{~kJ}\right)\)MHT CET 2020 Hard
- The half life values for two different first order reaction A and \(B\) are 75 minute and 2.5 hour respectively. What is the \(\frac{r_B}{r_A}\) ratio of rate constants?MHT CET 2025 Medium
- Find value of Q from following equations. (i) \(\mathrm{C}_{(\mathrm{s})}+\mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{CO}_{2(\mathrm{~g})} \Delta \mathrm{H}=\mathrm{QkJ}\) (ii) \(\mathrm{C}_{(\mathrm{s})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{CO}_{2(\mathrm{~g})} \Delta \mathrm{H}=-\mathrm{xkJ}\) (iii) \(\mathrm{C}_{(\mathrm{s})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{CO}_{2(\mathrm{~g})} \cdot \Delta \mathrm{H}=-\mathrm{ykJ}\)MHT CET 2024 Medium
- Two moles of an ideal gas are allowed to expand from a volume of to at against a pressure of Calculate the work done.MHT CET 2018 Hard
More PYQs from MHT CET
- If \(\vec{a}=\hat{i}+\hat{j}+\hat{k}, \vec{c}=\hat{j}-\hat{k}, \vec{a} \times \vec{b}=\vec{c}\) and \(\vec{a} \cdot \vec{b}=1\), then \(\vec{b}\)MHT CET 2021 Medium
- The equation of a curve whose normal at any point has a slope which is the same as the ordinate and which passes through \((1,-1)\) is \(2 x=\mathrm{k}\left(3-\mathrm{y}^2\right)\). Then k isMHT CET 2025 Medium
- Which of the following species shows the maximum magnetic moment?MHT CET 2012 Easy
- If \(A=\left[\begin{array}{cc}2 & -1 \\ -1 & 2\end{array}\right]\) such that \(A^2-4 A+3 I=0\), where \(\mathrm{I}\) is a unit matrix of order 2 , then \(A^{-1}\) isMHT CET 2022 Medium
- Let if
thenMHT CET 2016 Medium - A tetrahedron has vertices \(\mathrm{P}(1,2,1), \mathrm{Q}(2,1,3), \mathrm{R}(-1,1,2)\) and \(\mathrm{O}(0,0,0)\). Then the angle between the faces OPQ and PQR isMHT CET 2022 Medium