1.

A metal M readily forms water soluble sulphate MSO_(4) , water insoluble hydroxide M(OH)_(2) and oxideMOwhich becomes inert on heating . The hydroxide is soluble in NaOH. The metal M is

Answer»

Be
Mg
Ca
SR

Solution :`BeSO_(4)` is soluble in water , BeO does not DISSOLVE in water but being amphoteric dissolves in NAOH.


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