A metal M readily forms sulphate $M S O_{4}$ which is water insoluble. It forms oxide MO which becomes inert on heating. It forms insoluble hydroxide which is soluble in NaOH. The metal M is:

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A metal M readily forms its sulphate MSO4 which is water soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxide M(OH)2 which is soluble in NaOH solution. Then M is:

The correct option is A BeIn the periodic table, on moving down, water solubility of alkaline earth metal decreases. Oxides and hydroxides of alkaline earth metal are basic except Be which is amphoteric. Hence the metal M is Be.conclusion: hence the option (D) is correct.

A metal $M$ readily forms its sulphate $M S O_{4}$ which is water soluble. It forms its oxide $M O$ which becomes inert on heating. It forms an insoluble hydroxide $M (O H)_{2}$ which is soluble in $N a O H$ solution. Then M is:

The correct option is A $B e$
In the periodic table, on moving down, water solubility of alkaline earth metal decreases. Oxides and hydroxides of alkaline earth metal are basic except Be which is amphoteric.
Hence the metal M is Be.
conclusion: hence the option (D) is correct.