"Colloids are thermodynamically unstable with reference to bulk but kinetically stable". Identify the correct pair
Statements
Reasons
(A) thermodynamically unstable
(C) interfacial surface tension
(B) kinetically stable
(D) electrical double layer
(a)(A) $\leftrightarrow$ (D) and (B) $\leftrightarrow$ (C)
(c)(A) $\leftrightarrow$ (C) and (B) $\leftrightarrow$ (C)
(b)(A) $\leftrightarrow$ (C) and (B) $\leftrightarrow$ (D)
(d)(A) $\leftrightarrow$ (D) and (B) $\leftrightarrow$ (D)
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
The large interfacial (surface) free energy makes colloids thermodynamically unstable, and the electrical double layer repulsion keeps them kinetically stable: A ↔ C, B ↔ D.