Raoult’s law is obeyed by each constituent of a binary liquid sol… - Vidyadip

MCQ

Raoult’s law is obeyed by each constituent of a binary liquid solution when

A
the forces of attractions between like molecules are greater than those between unlike molecules.
✓
the forces of attractions between like molecules are smaller than those between unlike molecules.
C
the forces of attractions between like molecules are identical with those between unlike molecules.
D
the volume occupied by unlike molecules are different.

✓

Answer

Correct option: B.

the forces of attractions between like molecules are smaller than those between unlike molecules.

b
Raoult's law holds over the entire concentration range $x =0$ to $1$ in a binary solution then, for the second component, the same must also hold.

If deviations from the ideal are not too large, Raoult's law is still valid in a narrow concentration range when approaching $x=1$. for the majority phase (the solvent) The solute also shows a linear limiting law, but with a different coefficient. This law is known as Henry's Law.

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