S Block Elements

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

The correct order of density is :

The metal that has very low melting point and its periodic position is closer to a metalloid is :

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :

The correct decreasing order for metallic character is :

Statement I : An alloy of lithium and magnesium is used to make aircraft plates. Statement II : The magnesium ions are important for cell-membrane integrity. In the light the above statements, choose the correct answer from the options given below :

The element playing significant role in neuromuscular function and interneuronal transmission is :

Choose the correct statement(s) : A. Beryllium oxide is purely acidic in nature. B. Beryllium carbonate is kept in the atmosphere of $\mathrm{CO_2}$. C. Beryllium sulphate is readily soluble in water. D. Beryllium shows anomalous behaviour. Choose the correct answer from the options given below :

Chlorides of which metal are soluble in organic solvents :

The correct order of hydration enthalpies is (A) K$^+$ (B) Rb$^+$ (C) Mg$^{2+}$ (D) Cs$^+$ (E) Ca$^{2+}$ Choose the correct answer from the options given below :