Download App

Thermodynamics — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThermodynamics1 Mark
MCQ
The reverse of a spontaneous reaction is $....... :$
  • A
    always spontaneous
  • ✓
    always non spontaneous
  • C
    sometimes spontaneous
  • D
    There is no way of telling
✓

Answer

Correct option: B.
always non spontaneous
The revere of a spontaneous reaction is always non $-$ spontaneous.
According to the second law of thermodynamics, a reaction is spontaneous if the overall entropy or disorder increases.
If we go back to our cleaning the house analogy, when our home becomes messy, then the entropy increases.
The mess that accumulates is a spontaneous reaction, and as a result, the entropy increases.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Thermodynamics→Thermodynamics — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The correct order of dipole moment is
→
The plot of orbital wave function $\psi(\text{r})$ as a function of distance $r$ of the electron from the nucleus for $2\ s$ orbital is :
→
In an atom, an electron is moving with a speed of $600 \,m/s$ with an accuracy of $0.005\%.$ Certainity with which the position of the electron can be located is $( h =6.6 \times 10^{-34} \,kg\, m^2s^{-1},$ mass of electron, $e_m= 9.1 \times 10^{-31}\, kg)$ :
→
The number of molecules of $CO_2$ present in $44\,g$ of $CO_2$ is
→
Which of the following carbocation is most stable?
→
The value of equilibrium constant of the reaction

$HI \rightleftharpoons \frac {1}{2} H_{2(g)} + \frac{1}{2} I_{2(g)}$

is $8.0$. The equilibrium constant of the reaction

$H_{2( g )} + I_{2(g)} \rightleftharpoons   2HI_{ ( g )}$ will be

→
The angle between $s{p^2}$orbitals in ethylene is......$^o$
→
An aqueous solution of aluminium sulphate would show
→
Atomic weight of which set of elements were corrected by Mendeleev?
→
What is chemistry?
→