MCQ
Which one of the following is incorrect for ideal solution ?
- A$\Delta H_{mix} = 0$
- B$\Delta U_{mix} = 0$
- C$\Delta P = P_{obs} -P_{calculated \,by \,Raoult's\, law} = 0$
- ✓$\Delta G_{mix} = 0$
✓
Answer
Correct option: D.
$\Delta G_{mix} = 0$
d
The concept of an ideal solution is fundamental to chemical thermodynamics and its applications, such as the use of colligative properties. An ideal solution or ideal mixture is a solution in which the enthalpy of solution $\left(\Delta H _{\text {solution }}= O \right)$ is zero. As the enthalpy of the solution nears zero, the solution becomes more ideal.
The concept of an ideal solution is fundamental to chemical thermodynamics and its applications, such as the use of colligative properties. An ideal solution or ideal mixture is a solution in which the enthalpy of solution $\left(\Delta H _{\text {solution }}= O \right)$ is zero. As the enthalpy of the solution nears zero, the solution becomes more ideal.
Since the enthalpy of mixing (solution) is zero, the change in Gibbs energy on mixing is determined solely by the entropy of mixing ( $\Delta S _{\text {solution }}$ ).
So the $\Delta G$ is not zero.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Among the statements $(a)-(d)$, the incorrect ones are
→$(a)$ Octahedral $Co(III)$ complexes with strong field ligands have very high magnetic moments
$(b)$ When $\Delta_{0}< P$, the $d-$electron configuration of $Co(III)$ in an octahedral complex is $t_{\text {eg }}^{4} e_{g}^{2}$
$(c)$ Wavelength of light absorbed by $\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+}$ is lower than that of $\left[\mathrm{CoF}_{6}\right]^{3-}$
$(d)$ If the $\Delta_{0}$ for an octahedral complex of $\mathrm{Co}(\mathrm{III})$ is $18,000 \;\mathrm{cm}^{-1},$ the $\Delta_{\mathrm{t}}$ for its tetrahedral complex with the same ligand will be $16,000\;\mathrm{cm}^{-1}$
The correct order of the calculated spin-only magnetic moments of complexs $(A)$ to $(D)$ is
→$(A)$ $\mathrm{Ni}(\mathrm{CO})_{4}$
$(B)$ $\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$
$(C)$ $\mathrm{Na}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$
$(D)$ $\mathrm{PdCl}_{2}\left(\mathrm{PPh}_{3}\right)_{2}$
Reaction between an acid and alcohol will give
Glycogen is a branched chain polymer of alpha-D-glucose units in which chain is formed by C1—C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to __________.
Which of the following statements is false ?
Sulphur on boiling with $NaOH$ solution gives
→Which- of the reagents shown below would accomplish the following transformations?
→$A$ || $B$
In which case racemic mixture is obtained on mixing its mirror images ($d$ & $l$ form) in $1 : 1$ molar ratio?
→Which of the following pairs of complexes are isomeric with each other but their aqueous solutions exhibit different molar conductivities?
The standard e.m.f. of a call, involving one electron change is found to be $0.591\,V $ at $25\,^o C$. The equilibrium constant of the reaction is
→($F = 96,500\;C\;mo{l^{ - 1}}; \,\, R = 8.314\;J{K^{ - 1}}mo{l^{ - 1}})$