MCQ
For an ideal solution containing two liquid components $A$ and $B,$ the Gibbs free energy of mixing is minimum, when the molar ratio of the liquids is :
- ✓$1 : 1$
- B$1 : 2$
- C$1 :10$
- D$1 : 1000$
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Reason : The presence of additional $d-$ electron offer poor screening effect for the outer electrons from increased nuclear charge.

| Column $I$ | Column $II$ |
| $(a)\,XeO_6^{-4}$ | $(P)$ Tetrahedral |
| $(b)\,ClO_2$ | $(Q)\,V-$ Shape |
| $(c)\,NH_4^+$ | $(R)$ Trigonal Bipyramidal |
| $(d)\,XeO_3F_2$ | $(S)$ Octahedral |