The ionic radius of Na⁺ ions is 1.02 $$\mathop A\limits^o $$. The ionic radii (in $$\mathop A\limits^o $$) of Mg²⁺ and Al³⁺, respectively, are

Reaction of Grignard reagent, C₂H₅MgBr with C₈H₈O followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound B, C₁₀H₁₃Cl. The Compound B is :

Reagent, 1-napthylamine and sulphanilic acid in acetic acid is used for the detection of

A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is