JEE Main · 2023 · 11 Apr 2023 · Shift 2 · s-Block Elements

Alkali metal from the following with least melting point is :

(A)Rb
(B)K
(C)Na
(D)Cs✓ Correct

Answer: (D)

Solution

In alkali metals, melting point decreases down the group due to increasing atomic size and weaker metallic bonding. The order is: Li > Na > K > Rb > Cs. Therefore, Cs (Cesium) has the least melting point among the given options.

JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Single correct option

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