A solid dissolves in water if

A white crystalline solid A dissolves in water to give an alkaline solution . On heating A first loses water molecules and swells up . On further heating it turns into a transparent liquid which solidifies into a glossy bead . Name it.

A colourless solid A dissolves in water. The aqueous solution gives a white precipitate B when NaOH or NH_4 OH is added. B dissolves in excess of NaOH but not in excess of NH_4OH . BaCl2 solution added to a solution of A gives a white precipitate C which is insoluble in dilute HCI. A may be

A colourless solid A dissolves in water. The aqueous solution gives a white precipitate B when NaOH or NH_4 OH is added. B dissolves in excess of NaOH but not in excess of NH,OH. BaCl2 solution added to a solution of A gives a white precipitate C which is insoluble in dilute HCI. A may be

Oil dissolves in water.

Method to separate solid dissolved in water.

An electrolyte dissolves in water if :

Sodium oxide dissolves in water.

The table given below shows number of grams of five different solids dissolving in 100 g of the solvents : water, alcohol and chloroform (all at 20^(@)C ). {:("Solvent","Salt","Sugar","Iodine","Chalk","Urea"),("Water",36.0,204.0,0.6,0.0,100.0),("Alcohol",0.0,0.0,20.0,0.0,16.0),("Chloroform",0.0,0.0,3.0,0.0,0.0):} (a) Which solid dissolves best in water at 20^(@)C ? (b) Which solid is maximum soluble in alcohol ? (c ) Which solid is insoluble in all the three solvents ?