Thermodynamics · Chemistry · WB JEE

Three engines $\mathrm{A}, \mathrm{B}$ and C take steam at $130^{\circ} \mathrm{C}$ and reject it at $20^{\circ} \mathrm{C}, 40^{\circ} \mathrm{C}$ and $50^{\circ} \mathrm{C}$ respectively．The most efficient engine will be

Which of the following statements is correct for a spontaneous polymerization reaction ?

For a spontaneous process, the incorrect statement is

1 mole of an ideal gas undergoes the following processes：

Process $A \rightarrow$ Isothermal expansion at 400 K from volume $\mathrm{V}_1$ to volume $\mathrm{V}_2$ ，such that $\mathrm{V}_2=4 \mathrm{~V}_1$

Process $B \rightarrow$ Adiabatic expansion from volume $\mathrm{V}_1$ to volume $\mathrm{V}_2$ ，such that $\mathrm{V}_2=4 \mathrm{~V}_1$

Consider the following statements and select the correct one／s．

$X$ is an extensive property and $x$ is an intensive property of a thermodynamic system. Which of the following statement(s) is (are) correct?