Among the molten alkali metals, the example of an immiscible pair (in all proportions)is
(a)K and Na
(b)K and Cs
(c)Li and Cs
(d)Rb and Cs
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Lithium, with its much smaller atom and higher melting point, is immiscible with the heavy alkali metals; molten Li and Cs (also Li/K, Li/Rb) separate into two layers, while Na–K, K–Cs and Rb–Cs mix freely.